Why does PAIN occur? Understand the Mechanism of Pain

Pain is an unpleasant and distressing physical sensation caused by disease or injury, which induces hurt and anxiety in those suffering from it.
There are many different manifestations of pain, ranging from short term (acute pain) to long term (chronic pain). Other classifications include pain in the internal organs (visceral pain), injured tissue (inflammatory pain), nerves (neuropathic pain), etc.

The reason for the occurrence of pain depends on the cause and kind of pain being experienced. In most cases, pain acts as a warning sign that the body has been afflicted by a disorder of some sort, which may have arisen due to internal sickness or external wounding. Acute pains are generally cured on their own through rest or simple medication. Chronic pains, on the other hand, are more complicated in nature and the treatment requires more elaborate diagnosis.

The mechanism of pain

Pain is an extremely personal and subjective experience and affects each individual to varying degrees. The pain signals, which can arise in any part of the body, travel through the spinal cord to the brain along thousands of specialized nerves and nerve fibres. In the brain, it is processed in the centres associated with anxiety, emotions, memory, appetite, etc. Signals and pain inputs are then returned from the brain to the spinal cord, which may heighten or diminish pain.

In some cases, pain may also be induced by damage to the brain and spinal cord, which happens after a stroke.
A constant barrage of pain signals may cause the cells at the end of nerve fibres to become over-sensitized. This is known as 'wind-up' and is one of the most common causes of chronic pain that occurs even though the root of the problem has been identified and treated.

The causes and effects of pain differ from case to case depending on the signals received by the brain and its interpretation. It affects the individual's day to day activities and if persistent, can also have a harmful impact on mental health and psychosis. Pain is always handled, diagnosed and treated differently in all patients by drawing out the best possible solution to the problem.





Why does PAIN occur? Understand the Mechanism of Pain

Myths about Total Knee Replacement

Myth#1 - Knee replacement is a surgery for old people. “I’m too young for a knee replacement.”
Fact - Candidacy for a knee replacement is not based on age, but on the person’s level of pain and immobility. Living with a painful joint that prohibits you from working or participating in normal life activities is an outdated way of thinking. Age is not necessarily a limiting factor. Often times, a patient is actually fearful about the uncertainty of surgery. Once they are able to resume many of the activities they enjoyed before the surgery, with increased mobility and with less pain, they are very happy they had the surgery. The quality of life one achieves by living without knee pain is priceless.

Myth#2 - “I should wait as long as possible to undergo knee replacement surgery” 
Fact - You don't need to suffer by waiting until the pain is intolerable. The longer life of joint replacements enables people to consider surgery earlier and at a younger age. Osteoarthritis is a degenerative disease that continues to damage the joint and delaying surgery makes both surgery and return to activity more difficult. Delaying surgery lowers a patients’ quality of life not only before the operation, but even for up to two years following surgery.

Myth#3 - “I should continue with medications as long as possible”
Fact - Medicines including painkillers just give symptomatic relief for a temporary duration and prolonged usage is riddled with serious side effects such as renal failure, peptic ulceration  etc. All these medicines are NOT curable.

Myth#4 - Alternative therapies such as acupressure, ozone treatment, massage beds, oils, laser therapy, magnetic therapy; braces will cure my advanced arthritis and knee pain.
Fact - Till date there is NO cure for advanced knee arthritis and these alternate therapies are not backed by established scientific data. All these modalities give temporary pain relief in early to moderate arthritis for some duration only and are NOT curative. Often times, a patient who is actually fearful about the uncertainty of surgery lands up trying these in order to avoid surgery. 

Myth#5 - After a knee replacement, it takes months to recover.
Fact - Depending on the activity, most patients who undergo knee replacement are able to perform routine tasks within a few weeks. A return to rigorous activity takes only a few months. One becomes independent for himself before discharge from hospital. There’s no prolonged best rest required after the surgery.


Myth#6 - After knee replacement, I’ll have to give up some activities and sports.
Fact - You have a high probability of getting back to activities like brisk walking or cycling in 6 to 12 weeks. It will take a bit longer to return to more rigorous activities and contact sports. Squatting and sitting cross legged though possible but at best should be kept to minimal.

Myth#7 - Knee replacement surgery leaves a large scar that is noticeable.
Fact - Scarring is minimal compared to traditional surgery. In fact, the scar is typically only 3 to 5 inches long. As time passes, the scar will fade and become less noticeable.

Myth#8 - Knee replacement is a very painful surgery. There is lots of pain in post operative period.
Fact - With modern day pain management such as in a multimodal approach, ensures that the patient does not feel any pain in post op period and has a smooth recovery.

Myth#9 - Knee replacement is done one at a time.
Fact - Both the knees can be operated at the same time if the patient does not have significant co morbidities and is deemed fit to undergo the procedure by the doctor.

Myth#10 - The new knee lasts for 5-6 yrs. only.
Fact - With modern day precision including computer assisted knee replacement and advancement in biomaterials, the survivorship has increased considerably. Today's joint replacements last 25 years or longer and, for most people, will last a lifetime.

Myth#11 - Knee replacement cannot be done a second time.
Fact - Knee replacement can be done multiple times what is called as a revision joint replacement surgery with good survivorship.

Myth#12 - “I am obese, I cannot undergo Knee replacement surgery.”
Fact - Knee replacement can be successfully done in an obese patient though the recovery is somewhat prolonged and might require additional implants. However, patients who are morbidly obese and have restricted mobility primarily due to obesity are better off after a bariatric procedure.

Myth#13 “I have diabetes or hypertension or heart ailment, so  I cannot undergo Knee replacement surgery.”
Fact  - diabetes hypertension or heart.



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 13 Myths About Total Knee Replacement (TKR), Busted!

Treatment of frozen shoulder varies depending on the stage it is at, and how severe is the pain and stiffness. There is no outright cure and the aim of treatment is to keep the joint as mobile as possible. The most effective treatment is that which maintains a good range of movement until the shoulder starts to heal. 

Treatment may Include the following:

1. Shoulder exercises: Regular, gentle exercise can help to keep the shoulder joint mobile. If your shoulder is very stiff, exercise may hurt, and it should only be carried out with the guidance of your doctor or physiotherapist. If you are able to, continue using your shoulder as normal saving' the shoulder can cause the muscle to waste and may make stiffness worse.
2. Painkillers: Over-the-counter painkillers such as paracetamol or prescription-only drugs such as codeine may be taken to ease pain and you should discuss this with your general physician or pharmacist.
3. Anti-inflammatory painkillers: Such as ibuprofen and diclofenac, are often prescribed to ease pain and inflammation. Any medication that you take should be discussed with your general physician or pharmacist.
4. Steroid injections into or near the shoulder joint may be effective at relieving pain and inflammation for a few weeks. However, injections are not a cure, and symptoms may return.


Treatment of frozen shoulder

Knee pain is something that can affect anyone - irrespective of their age. While sometimes it may be of minor importance - and can easily be handled by self-care, often, lingering pain is a manifestation of some other serious underlying problem, such as arthritis. In this case, it is imperative that you consult a doctor and take appropriate measures to combat it.

Causes :

Arthritis: The chief cause of lingering knee pain, arthritis itself can be of a number of types:
 Osteoarthritis, which is a result of deterioration of cartilages due to wear and tear
 Rheumatoid Arthritis, an inflammatory chronic disorder
 Septic Arthritis, causing pain, swelling and redness.
 Gout caused due to the development of uric acid crystals in the joints
Fractures: These are caused by the breaking up of the kneecap due to falls or collisions.
ACL Injuries: Caused due to the tearing of the anterior cruciate ligament (that connects the femur and the shinbone). Especially common in sportspersons such as footballers or basketball players.
Meniscus tears: The meniscus or the rubber-like cartilage (that acts as a shock absorber) can be torn by sudden jerks or excess pressure.

Symptoms:The major symptoms of knee pain include weakness, redness, instability, stiffness or the inability to properly straighten or move the leg. Often, a deformity is also visible, such as a bone sticking out of the leg - in which case it is advisable to consult a doctor immediately.

Possible risks :Factors which include the odds of being inflicted by knee pain and cause serious complications include :
Being overweight: This exponentially increases the stress or pressure that is applied on the knee joints - even in doing mundane tasks like walking up and down stairs.
Excessive physical activity: Some activities, such as sports apply excess stress on the knees as compared to other tasks.
Loss of muscle flexibility: Tightness or weakness in muscles causes increasing number of problems in the knees.

All About Knee Pain

It is normal and alright to feel pain in the knees occasionally after a physical activity or prolonged walking. However, it is a serious cause of concern if the pain is experienced every now and then. Not responding to your knee pain for long can lead to the extreme disability. Knee pain does not crop up in a day and it may surprise you when it first appears. 

Initially, you may notice slight pain and discomfort. If you have identified knee pain at this level, managing it is easy. You can perform different exercises to prevent pain from occurring. If the pain severe, you need to go consult a doctor, who will then help identify the real cause of pain. The following exercises, along with medications, can help you overcome knee pain and restore the mobility of the joint.

Stair Step ups: Choose a comfortable stairway. Place your hand on the wall or banister. This is to ensure that you are balanced. Your left foot should be on the taller step. Your right foot should be on the ground. Stay in this posture for a second. Now, step back, and bring left foot to the right foot. Repeat this 6 times. Reverse the legs and continue doing for 6 times. If you want to take rest between the steps, feel free to do so.
Ups and Downs: You need an armless chair that is strong. Sit on the edge but comfortably. Your arms should be at your side, relaxed and loose. Sit erect and your feet should be flat. If you feel you need balance, and then cross your arms. Start standing up. This should not be instant but deliberate, controlled, and gradual movement. Stand slowly up to the full height, and hold on for 2 seconds. Again sit down. Repeat this 5 times.
Straight Leg Raise: This can be a part of your everyday exercise regime. This is a strengthening workout that does not put too much effort on the knees. Lie down on your back. One leg should be straight on the ground and the other one should be bent. Now, slowly lift the leg that is straight, and the toes should point upward. Raise your leg up to 30 degrees, but you can start with 15 to 20 degrees in the initial stage. Repeat 15 times and perform at least 3 sets of this exercise. Keep alternating legs. This workout strengthens the knees, thigh muscles, and the ankle joints, thus offering multifold benefits.
Wall Hamstring Stretch: Hamstring muscles too can be the cause of knee pain and discomfort. To strengthen the hamstring muscles and alleviate knee pain, this exercise helps a lot. Lie down on the floor flat. Your feet should be flexed. Choose a space that is close to a wall, or a sturdy table. Your right leg should be propped on the wall or table. If you don t prefer any, a resistance band is a good alternative. When stretching, you can find your flexibility level and when you feel that you have reached the deepest point, start relaxing. Keep alternating contracting and relaxing every 5 seconds. After 10 to 15 sets, you can try the same with the left leg.
Knee Rolls: Use an exercise mat or a carpet that is cozy. Lie on your back. Bend the knees, and ensure your feet are flat. Your arms should be stretched on the sides. Look at the ceiling, and hold the knees together. In the same posture, slowly roll the knees towards the right. When you feel a gentle twitch or after 5 seconds, move to original position. Then lower the knees to the left. Hold and release. For each side, repeat 10 times.
These exercises strengthen the knees and improve the quality of life by bidding bye to the pain. Understanding that these are magic remedies that work overnight is the key to stay focused and keep going without quitting.

Exercises That Can Help Relieve Knee Pain!

Knee pain or injuries are very common and have numerous causes. Knee pain can emerge from delicate tissue wounds like ligament sprains and muscle strains. Bone conditions like knee joint pain, Osgood Schlatters, and biomechanical dysfunction can also cause knee pain. Treatment can include basic knee mobilization techniques, taping, massages or knee strengthening exercises completely through a careful recovery method after knee replacement or reconstruction.

Physiotherapy can help you overcome the pain and increase your strength and flexibility. A physiotherapist can suggest you a number of treatments and also help you understand your issue and get you back to your everyday routine. Physiotherapists are said to be successful in getting rid of the source of the knee pain by diagnosing a cause. This includes tightness around the knee and treating it with stretching and exercises.

Following are some of the exercises a physiotherapist might generally recommend for knee pain:

Hamstring stretch: Stretching keeps you flexible and increases your scope of movement, or how far you can move your joints in different directions. It additionally helps you reduce your chances of injuries and pain. Continuously warm up with a five minute walk first. Lie down when you are prepared to stretch your hamstring. Circle a bed sheet around your right foot, use the sheet to pull the leg up and hold for twenty seconds and then lower the leg. Repeat twice and switch legs.
Calf stretch: Use a chair for balance. Bend your left leg. Step back with your right leg and gradually straighten it behind you. Press your left heel toward the floor. You should feel the stretch in the calf of your back leg. Hold for 20 seconds. Repeat twice and then switch legs.
Straight leg raise: It helps build muscle strength to give support to the weak joints. Lie on the floor. Twist your left knee, foot on the floor. Keep the right leg straight, toes pointed up. Tighten your thigh muscles and raise your right leg.
Quad set: With these, you don't raise your leg. Just tighten the thigh muscles, also called the quadriceps, of one leg at once. Begin by lying on the floor. Keep both legs on the ground, loose. Flex and hold the left leg tense for five seconds and then relax. Do three sets of ten repetitions. Switch legs after every set.
Cushion squeeze: This move strengthens your legs from the inside so that they can support the knees. Lie on your back, both knees facing inwards. Place a cushion or a pillow between the knees. Press your knees together, squishing the cushion between them. Hold for five seconds and then relax. Do three sets of ten repetitions. Switch legs after every set.
Heel raise: Stand tall and hold the back of a seat for support. Lift your heels off the ground and rise on the toes of both feet. Hold for three seconds. Gradually lower both heels to the ground. Do three sets of ten repetitions. 

Knee Pain - How Physiotherapy Can Heal Knee Pain?

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