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

Knee pain is one of the most common and painful ailments that can limit mobility. Injuries can result in cartilage or meniscal tears or sprains too. Obesity is another reason because of which knee pain is on the rise. Also, regular wear and tear of ligaments and tendons around the knees due to old age is another cause. These days, with reduced physical activities and sedentary lifestyles, the rate at which knees are wearing out has also become accelerated. Whatever the reason, a correct diagnosis followed by prompt treatment can help. Over the years, physiotherapy has been playing an important role in treating knee injuries. Whether to supplement the various drugs to reduce pain and inflammation or to avoid surgery, physiotherapy has helped many and its popularity is growing every day. Here are some ways that physiotherapy can help reduce pain.

Improve flexibility of tendons: The knee cap is an area where there are lot of tendons and ligaments, coordinating to enable movement. Careful exercising can ensure that the flexibility of tendons and ligaments is improved, thereby making your knee movement easier and less painful.
Improves blood supply: As we all know, proper movement requires good blood supply. Exercising with special focus on the knee ensures that blood supply is improved, and thereby the supporting ligaments and tendons function optimally.
Enhances the knee cap function: The knee cap is that portion which joins your thigh bone to your calf bones. This is prone to slip out of place, especially with arthritis and injuries. This can be painful and limit movement to a great degree. Focused exercises aimed at improving knee cap function will ensure that the knee cap has a wider range of function, and does not slip out of its socket easily.
Reduce rigidity: Once you start physiotherapy, you will feel your knees getting more flexible. The rigidity that had set in as a result of injuries and/or old age will also reduce over a period of time.
Slow down the wear and tear: When you start physiotherapy after knee damage, continuing the exercise routine, of course with expert guidance, can reduce the pace at which further damage might happen. A word of caution though. Be sure to consult an experienced physiotherapist before you begin. Exercising in a bad manner can do equal or more harm than the original injury or old age itself.

Knee Pain and Physiotherapy

Knee is a hinge joint where the lower leg bone tibia meets the thigh bone femur. During osteoarthritis, cartilage or ligament defects and degenerative arthritis, knee replacement surgery is recommended world-wide to get relief from extreme pain. Knee replacement surgery, also known as knee arthroscopy, is a surgical procedure, in which the affected knee joint is replaced with synthetic material. The most likely candidates for total knee replacement are the patients with severe destruction of the knee joint coupled with progressive pain and impaired function.

Modern technological advances have made computer assisted knee replacement surgery extremely popular around the globe. In this surgery, the surgeon is assisted by a computer to remove the optimum amount and angle of the bone, which otherwise is done by inspecting manually. This is an excellent example of surgery through small incision and it eliminates the chances of human error. A perfect alignment and balance is achieved and hence longevity is also increased to 20 - 30 years. Knee replacement surgery is also specific to gender as the anatomy of male and female patients is different.

There are many types of knee replacements, most common being the total knee replacement or Total Knee Arthroplasty. In addition, there is partial knee replacement, bilateral knee replacement, revision knee replacement and knee arthroscopy.

In knee replacement surgery, the worn out surfaces of joints of knee are replaced with artificial implant of plastic and metal. The lower end of the femur bone is removed and replaced with a metal shell. The upper end of the lower leg bone (tibia) is also removed and replaced with a channelled plastic implant with a metal stem. A plastic ball is also added under the kneecap depending on its condition. These artificial components are commonly referred as prosthesis. The design of these highly flexible implants replicate knee, with the rotating knee replacement implants assist in backward and forward swing of the legs.

Patients whose knee joints have been damaged by either trauma or progressive arthritis should consider total knee replacement surgery. Post-surgical hospital stay after knee joint replacement is usually three to five days. The surgery has a very high success rate and shows dramatic improvement after a month. This improvement is most notable one month or more after surgery. The pain caused by the damaged joint is reduced significantly when the new gliding surface is constructed during surgery. Initially, patient will walk with the help of a walking aid until the knee is able to support full body weight. After six weeks, patient can walk comfortably with minimal assistance. Patients with artificial joints are prescribed to take antibiotics during the course of any elective invasive procedures including dental work. Physiotherapy is an essential part of rehabilitation and it will increase the muscle strength and patient can enjoy most activities, except running and jumping.

Knee Replacement

Causes and symptoms of knee pain

Knee pain is characterized by a feeling of pain in the knee joint caused by injury or overuse. The knee joint consists of small bone structures, the kneecap, supporting ligaments and cartilage of the knee. This joint bears the full weight of the body, which makes it very vulnerable to injury.

Causes of knee pain

Knee pain is usually caused by injuries to the knee such as exposure to a direct force on the knee, abnormal twisting of the knee or falling on your knees. Some causes of knee pain are -

Knee strains and sprains - Overworking the knee joints can damage the tissues of the knee joint resulting in knee sprains and strains

Osteoarthritis - it is condition where the protective cartilage around the kneecap is damaged, resulting in knee pain

Bursitis - Excessive movement of the knee or kneeling down for extended periods can irritate the bursa (a fluid sac below the skin above the knee joint) that causes swelling and pain, thereby giving rise to this condition

Gout - This condition is characterized by the accumulation of uric acid in crystal form around the knee joint, causing inflammation and pain

Tendon disorders - Tendons connect the muscles to the bones, and overworking the knee can cause the tendons around the knee to become sore and painful

Kneecap dislocation - Injuries may cause the kneecap to shift out of its position, this causes swelling and pain in the knee joint

Symptoms of knee pain

Severe knee pain can restrict movements such as walking or standing. The symptoms vary according to the extent of the damage suffered by the knee. Most common symptoms of knee pain are problems in climbing stairs, inability to extend the knees, limping and swelling of the knee joint. In some cases, knee pain may also cause fever.

Causes and Symptoms of Knee Pain

The knee is the largest joint in the human body and is a complex structure formed of bone, muscle and cartilage. Development of pain in the knees can be caused by numerous factors such as aging, injuries, diseases, dietary deficiencies, etc.

Arthritis is the most common cause of knee pain and usually affects the elderly and aged. It occurs due to an inflammation of the joint and causes pain, swelling, redness and inflexibility of the knees.

What are the factors that determine treatment method?

Diagnosis for knee pain varies from patient to patient as each case is different and must be approached differently. Some of the factors that determine the treatment method are as follows:

- Cause of the problem
- Nature and intensity of pain
- Age of the patient
- Medical history of the patient
- Diet and lifestyle of the patient

There are a number of different types of arthritis which can affect the knees in different ways and, consequently, require different types of treatment methods.

What are the various treatment methods for knee pain?

1. Conventional Remedies - These are used in case of conditions that are not too severe or chronic. It includes keeping on bed rest, using an ice pack, taking a painkiller and anti-inflammatory medicines, wearing knee braces, etc.

2. Physical Therapy - There are many stretching and strengthening exercise routines that help alleviate knee pain and treat the condition. Recovery is achieved by making the muscles around the knees stronger and increasing stability and flexibility.

3. Injections to the Knees - A number of anti-inflammatory substances and supplements, as well as lubricants, can be injected into the knee joint which helps reduce pain and makes the joint more supple.

4. Stem Cell Therapy - This involves drawing platelets from the patient's blood and injecting it into the knee joint for repairing damage caused to ligaments, tendons or cartilage.

5. Surgery - Surgical procedures for treating knee pain include partial or complete knee replacements.



What kind of treatment does your knee pain require?

Three Ways to Protect Your Knees

The knee is known as the largest and one of the most complex joints in the human body, and also one of the most vulnerable, as it supports the weight of the entire body. The knee joint is made up of several elements including the knee cap, meniscus, connective tissue, tendons, ligaments, cartilage, and muscles. Damage to any part of the knee can cause chronic pain. So how can you protect your knee from damage and injury? Take a look at these three points!

Dealing with Load: Weight is a big one. Carrying around extra pounds and kilograms can be detrimental for your knees in the long run. Your knee is not equipped to handle the excessive weight. It already supports three to five times your weight when you get up and walk around or indulge in some mild jogging. One must be careful of those extra pounds to take the load off the knee and keep it from falling prey to damage.

Exercise: Moderate to intense exercise is prescribed for one and all. This, of course, depends on one's overall health and age. If you are already suffering from joint pain, then you may want to go easy on the exercise with a focus on building muscle strength and foundation. If you are healthy, then some amount of daily exercise as a routine will keep those knees in prime working condition and well lubricated as well. Inactivity and a sedentary lifestyle can affect the knees very badly.

Do not Ignore: Warning signals such as chronic or acute knee pain should not be ignored. Remember to see a doctor or an orthopaedic specialist to find out if you have contracted an infection or if you may have suffered a fracture due to an injury. Also, it is important to take a bone density test regularly, especially after the age of 40 or for women going through menopause, as this will point to any deficiencies and even warn you in case there is any trace of osteoporosis.

Rest, exercise, and food should be kept in fine balance for a healthy body. These are a few measures that one can take to keep knee pain at bay. Yet, it is also advisable to speak with a doctor at length regarding measures to protect your knees.

Remember to ask us for a private consultation today!

Three Ways to Protect Your Knees

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