Our knee is one among many joints in the body. Since it is in the weight bearing axis it bears the brunt of body weight. It is a hinge joint (like a hinge at door for opening or closing it). It is made of following bones - femur (thigh bone), tibia (shin bone) and patella (knee cap). 

Imagesource - Wikipedia

In this article I will be dealing about the types, risk factors and treatment of it.

Types 

  • Age-related -AKA Osteoarthritis which is a misnomer as it should be called osteoarthrosis,as there is no active inflammation (word inflammation literally means burning of body tissue)
  • Rheumatoid and other type of arthritis
  • Post- traumatic arthritis.
Normal & arthritic knee. (Image source - Internet)

Risk Factors: Certain conditions can predispose to increased knee wear & tear: 

  • Having an uncontrolled hypertension. 
  • Rapid gain of weight or increased BMI(Body Mass Index) 
  • Pre-existing trauma 
  • Polio in opposite limb 
  • Arthritis of other joint 

Myth -Being active leads to more wear & tear - NO IT DOESN'T.

Treatment:

  • It includes Analgesics as & when required, but exercise caution in females, diabetics and pre-existing kidney or liver disease patients - they should avoid taking excessive analgesics. A caveat here is that it is a temporary measure to tide over a crisis, one should instead focus on long-term measures once pain is better. 
  • Knee support - this is preferred to knee cap, which can help off-load knee joint & thus prevent further wear and tear of the joint. 
  • Knee exercises - few of the exercises are shown below. 
  • RFA - radiofrequency ablation of the nerves supplying the knee joint. This is a US-FDA approved non-surgical technique to mitigate your joint pain. For more information, should consult your orthopaedic surgeon. 
  • Intra-articular injections - These are measures to increase the smoothness or to relieve acute pain in your knee joint. They can be Hyaluronic acid injections or steroid injection to reduce pain or Platelet-rich plasma injection. To know its pros and cons - efficacy, duration of relief, need for repeat injections if any, you should consult a joint replacement surgeon before you zero-in on any of it. 
  • Calcium supplementation - can help to strengthen the bones which form your joint. Please take only if prescribed by your bone specialist doctor. 
  • Role of surgery - it can be different types like either replacing only one compartment or offloading your knee     joint or total joint replacement. A detailed discussion of which is beyond the scope of this article, may write another article focussing on only the surgical aspect of knee arthritis.

Knee exercise

HEEL SLIDES - Repeat a few sets, morning and evening.
ISOMETRIC QUADRICEPS EXERCISE - Press and hold for about 10 seconds, repeat a few sets, morning & evening or as feasible.
ANKLE PUMPS
SEATED KNEE EXTENSION - Hold for a few seconds, repeat a few sets in a day.
STANDING KNEE FLEXION 

Another frequently asked question is the one below- 

What are things to take care when suffering from knee pain or to avoid after knee replacement surgery?  

  • Avoid sitting cross-legged.       
  • Avoid sitting on floor. 
  • Avoid Indian toilets.    
  • Avoid climbing stairs.       
  • Don’t put on excessive weight in short time.

For further doubts, clarifications or treatment,you are always welcome to seek my suggestion.