Hello.

Thank you for your query at DoctorSpring.com.

Tenderness persisting after 20 years of an injury is unusual. 

If that injury resulting in tenderness did not progressively worsen and there was no restriction of knee movements in the initial period of injury, it would have been a minor soft tissue injury which would have healed on its own.

It seems to me that the occasional tenderness and the dull achy feeling you have, are simply a soft tissue strain. After the injury, perhaps the ligaments and nerves in that area have become more sensitive to stresses. If your work involves a lot of standing or moving about, these symptoms can occur.

You can regularly perform muscle strengthening exercises for the legs and increase their endurance.

Overall, as long as it is only mild and does not impede your daily activities, and you remain physically active, there is nothing to worry.

If there is severe calf pain, where the calf is painful to even light pressure, it may indicate Deep Vein Thrombosis(DVT) which is usually seen in people with pre-existing venous disease of legs(varicose veins etc), bed ridden individuals, in patients who are immobile especially after surgeries, and rarely in women taking OCPs etc. However, this is unlikely in your case if you do not match any of the patient characteristics mentioned above. Also, given the long standing nature of your symptom it is unlikely to be DVT.

I hope that was helpful.

Feel free to ask queries.

Thank you.

Hello.

I have noted the additional history. From your symptoms, it is likely that what you had at that time was a soft tissue injury. This would have healed on its own but the nerves supplying that area would have becom hypersensitive following the trauma. The tenderness you are experiencing could be a neuropathic pain.

DHEA supplements are not going to help with this. Instead, you can take Vitamin B12 (Cyanocobalamin) supplements. If the tenderness persists, you may require drugs like Pregabalin or Gabapentin for relief. If your symptoms become unbearable, you can consult your doctor for a prescription for the same.

I hope this was helpful.

Thank you.

Hello.

When I said soft tissue injury, I meant injury to the the tissues under the skin such as the muscles, fascia or the subcutaneous layer.

If you had an injury to the structures within the joint between the femur and tibia, or around it such as a ligament or a meniscus injury, it would not have persisted for so many years. Small tears in these structures heal within a few months.

The swelling of your knee after flexion, back in 2002, could have been due to a ligament sprain. Once the swelling and the pain recede, the sprain would have healed by itself too.

Menisci are somewhat circular cushion like structures present between the thigh bone-femur and the large leg bone-tibia. They are present within the joint between these two bones.

If you are worried about an injury anywhere in your knee, I suggest that you please consult an orthopedic surgeon and have your knee examined. This will be reassuring for you.

I hope this was helpful.

Thank you.