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

Avascular Necrosis, also termed as Ischemic Bone Necrosis or Osteonecrosis is a medical condition characterized by the bone death on being deprived of blood. The condition is known to occur in the shoulder, ankles, and knees. However, the part of the body most affected by Avascular Necrosis is the hip. In this article, we will describe the conditions that contribute towards Avascular Necrosis of the hip along with the associated symptoms.

Factors that lead to Avascular Necrosis of the hip
The supply of blood to the bones may be interrupted by a myriad of factors some of which include

1. Certain medical conditions and health disorders such as

Gaucher's disease: A genetic disorder resulting from glucocerebrosidase enzyme deficiency. As a result, glucocerebroside gets deposited in the cells of the macrophage-monocyte system.
Sickle cell anemia: A genetic disorder which results in the RBC's appearing like a sickle cell instead of being round shaped.
Both of these conditions bring about a significant reduction in the supply of blood to the bones resulting in Avascular Necrosis.

Certain inflammatory conditions that may damage the arteries and trigger Avascular Necrosis of the hip include autoimmune diseases, pancreatitis or HIV infection.

2. Extensive and prolonged use of corticosteroids: Often used as non-inflammatory drugs, corticosteroids can play a contributing role, resulting in Avascular Necrosis (non-traumatic). The fatty substances are usually broken down by the body. However, the use of corticosteroids may affect this breakdown as a result of which the fatty substances start piling up in the blood vessels, constricting their size. The constricted blood vessels, in turn, reduces the supply of blood to the bones to a great extent.

3. An injury or a fracture affecting the femur: A hip fracture or a dislocation that affects the upper half of the thigh bone or the femur acts as a potential threat, triggering a traumatic Avascular Necrosis (AVN) of the hip.

In some case, radiation therapy or chemotherapy for cancer can go a long way in interfering with the ability of the bone (weakens the bone) to receive blood, causing bone death.

People who are into heavy drinking stand a greater risk of suffering from AVN. An increased consumption of alcohol causing constriction and narrowing of the blood vessels interfering with the flow of blood to the bones.

Symptoms characteristic of AVN of the hip

Unfortunately, the initial stages of AVN are asymptomatic. However, as the condition progresses into later stages, a person may experience pain and discomfort, particularly while exerting pressure on the bone affected by the condition.
As the bone and the adjacent joints deteriorate and collapse further, a person may experience great difficulty in using the joint altogether.
In some cases, the condition may progress and affect both the hips (Avascular Necrosis Bilateral).

Causes and Symptoms of Avascular Necrosis of the Hip

Shoulder pain can be a persistent dull and nagging sensation in the upper arm or shoulder area. It can be easily differentiated from neck pain as it is related to the movement of shoulders i.e. it will increase and decrease with shoulder movements, especially overhead activities. The other signs to identify shoulder pain is if your shoulder movements are reduced.

If you find it difficult to scratch / wash your back, comb your hair or reach your back pocket, it clearly shows you are suffering from shoulder pain. Shoulder pain can happen due to various reasons, it varies from person to person depending on the activities he/she is involved in, for e.g. sports, manual job etc. It can be a single major injury or multiple small injuries due to repetitive usage patterns. Also, degenerative changes in various parts of the shoulder can lead to shoulder pain.

In case of middle to old age, injuries that can cause shoulder pain are:

    Biceps Tendonitis
    Acromio-clavicular Joint arthritis
    Scapular Dyskinesia
    Trapezitis
    Suprascapular nerve entrapment In young age, injury due to sports or gym activity can cause shoulder pain
    Superior labral anterior/posterior (SLAP tear)lesion

Also, traumatic or repeated dislocations of shoulder can cause shoulder pain due to:

    Bankart lesion

Diagnose Shoulder Pain

Shoulder pain can be diagnosed only after thorough history taking and clinical examination. However, some imaging studies can be very helpful like:

    X-rays: Through an x-ray one can view the shoulder in many different views.
    Ultrasound: With an ultrasound, you can also check the damaged caused to the tendons and muscles of the shoulder but the quality of reporting depends upon the expertise of the doctor.
    MRI: MRI gives a clear picture of the shoulder as it shows everything related to a shoulder joint that is joints, vessels, tendons and muscles that too from different angles.
    Diagnostic Arthroscopy: A surgical procedure often used by orthopaedic surgeons to diagnose and treat issues inside a joint. Arthroscopy has the big advantage that one can use it to diagnose as well as treat at the same time.

Treatment for Various Types of Shoulder Pain

    For Shoulder Impingement or Rotator Cuff tear: Give rest to the shoulder for a few days only Dedicated Physiotherapy Protocol Bursal injections If these fail then, (Surgery)Arthroscopic sub-acromial decompression If Cuff tear is found, then one can go for Arthroscopic/Mini-open repair
    Labral Lesions: For anterior Labral lesions (Bankart's) following anterior shoulder dislocation then surgery in the form of Arthroscopic Bankart's repair is the only option to reduce risk of recurrence and degeneration.

SLAP Lesions

    Pain relief and physiotherapy as first step If this fails then following surgical options are available
    Arthroscopic debridement or repair of labrum
    Biceps tenotomy or tenodesis

Arthritis

In this case, the joint is already destroyed and has to be resurfaced for pain relief and to maintain ROM. If Rotator cuff muscles are working, then Shoulder resurfacing hemiarthroplasty (preferred in young people), that has a life of 10 to 15 years, Total shoulder replacement (preferred in middle aged to old people) has a life of 10 to 15 years. But, if rotator cuff muscle are not working then Reverse Geometry Shoulder replacement is recommended, that has a life of 10 years.

It is always advisable to get yourself diagnosed properly in case of shoulder pain as management changes depending on clinical situations. Neglecting shoulder conditions can lead to bigger problems later on.

Always remember 'a stitch in time saves nine'

Shoulder Pain: Causes, Diagnoses & Treatment

10-minute easy exercises to relieve back pain

Most of us lead sedentary lifestyles these days which have led us to experience severe problems with our spine. Irrespective of your age, a majority of people today suffer from back pains as a result of sitting for long periods. The most effective way to counter back pain is to strengthen your spine to make it capable of dealing with these aches in a better manner.

These 3 exercises will help you counter back pain quickly.

1. Leg lifts - a lot of us have weak abdominal muscles as compared to other regions and this leads to an imbalance in the muscle strength of different groups. Leg lifts help restore that balance. You have to lie on your back and choose a firm and rigid surface. Start by lifting your legs slowly and avoid any bending. Keep lifting them to bring them at an angle of 90 degrees with your upper body and then return to the starting position. Around 15-20 repetitions of this exercise on a daily basis are bound to give you much relief from recurring back pain.

2. Cycling - this exercise is perfect for building coordination among all the abdominal muscles of your body. Set your body in a sit-up position with your back on the floor and knees bent. Next, move your legs in a pedalling position, as you would do in case of riding an actual bicycle. Continue the movement for about 20 seconds in each direction.

3. Plank positions - in a plank position, you are required to hold your body in a particular position for a specified time period. For example, you can perform a plank position by holding your body in a position that it would acquire during a push-up. Do not rest on your palms and instead bend them at your elbow, so that your weight now rests on the forearms. Breathe deeply and hold the position for a minimum of 30 seconds.


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10-Minute Easy Exercises To Relieve Back Pain

Most of us suffer from lower back pain at some point in our lives; be it from a sedentary lifestyle, spending hours at the office desk or from strenuous physical exercises. In most cases, a little bit of rest does the trick. However, if the lower back pain persists for 3-6 weeks, physiotherapy is recommended.

How does physiotherapy help?

The main purpose behind physiotherapy is reducing lower back pain and increasing muscle and bone function, so that such instances are avoided in the future. Physiotherapy is the first line of defence against lower back pain. More drastic measures such as surgery are undertaken once physiotherapy fails to do is job.

Physiotherapy is often recommended when the back pain is caused due to lifestyle factors, a minor injury like a fall or other moderate factors. For more severe back injuries, doctors recommend surgery straight away when there is no scope of performing physiotherapy.

Low-intensity back pain can be cured using a combination of heat packs, ultrasound wave therapy and Iontophoresis (using a localized current source to introduce medical ionic compounds to the body).

A physical therapy program for back pain usually has two components:

Passive physical therapy to help reduce the patient's pain to a more manageable level

Active exercises

Passive Physical Therapy - Modalities

The physical therapist may focus on decreasing pain with passive physical therapy (modalities). These therapies are considered passive because they are done to the patient. Examples include:

Heat/ice packs

TENS units

Iontophoresis

Ultrasound

Active Physical Therapy - Back Pain Exercises

In addition to passive therapies, active physical therapy (exercise) is also necessary to rehabilitate the spine. Here are some of the common exercises for back pain:

Back Stretch: Put your hands underneath your head while lying back. Bend your knees but put your feet on the ground. Roll your legs to one side and hold them there for 10 seconds. Repeat three times for each side.

Deep Lunge: For this, you need to kneel on one knee with the other foot pointed towards the front. Lift the back knee up and hold it there for five seconds and then bring it down. Repeat this exercise three times for each side.

One Leg Stand: This is the simplest of exercises. Hold on to a wall for support while standing and face towards it. Then slowly hold one leg and bend it behind you. Hold in the same position for five seconds before bringing it down. Repeat the process three times for each leg in five second gaps.

Physiotherapy for Back Pain

Acupuncture is a kind of therapy that combines needles with pressure and pain points in order to delicately apply pressure for pain relief. This form of physical therapy is being increasingly recognised as an efficient method of treating pain in joints, muscles, bones and even for migraine pain. So let us find out more about Acupuncture and pain management.

    Chronic or Long Term Pain: There are many ailments that cause chronic or long term pain. These include back pain, neck pain, stiffness in the joints, osteoarthritis, headache and migraine, and pain in the shoulders. All this can be treated over a long period of time with the help of simulated acupuncture which uses pointed apparatus for activating better blood circulation for overall improvement in the pain that is being experienced in the area. The use of this apparatus helps in avoiding the harmful medication that can have adverse side effects.
    Menstrual Cramps: A fine needle method at the right points can help in bringing down the symptoms of the painful condition called dysmenorrhoea during menstrual cycles. With acupuncture, the acupuncturist can administer acupoint therapy to relieve menstrual cramps. This will help in moving the qi, or life force, in a better way so that the pain will stop. 
    Acute Pain: Over use of muscles, joints and repetitive, work related movements and strain can lead to acute pain. This includes wrist pain, shoulder pain, elbow pain, back pain, lower back pain, neck pain and even leg pain. With acupuncture, the patient gets rid of the pain in close to twelve sittings.
    Pain due to Cancer Treatment: Cancer and its treatment can take a heavy toll on the body and lead to a series of complications which also includes pain. A clean needle procedure can be followed along with the chemotherapy and radiation or after it, so as to relieve the patient of the pain experienced. Also, it can be used to replace traditional chemotherapy and radiation. 
    Better Rest: When the needles or apparatus touch the pressure points and circulate the blood and life force, it actually creates a soothing effect and helps the patient sleep and get better rest. This is also a requirement for pain relief. It can bring better blood flow to the area and help in removing anxiety and stress related to pain so that there is better chance of getting rest. 

With the use of acupuncture, pain can be taken care of with the needles and various tools that come in various shapes. These tools and equipment can also use laser treatment along with the point focused treatment.

Acupuncture and Pain Management

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