Q: My son is 13 and just had a growth spurt. He is complaining of pain below his kneecap.

February 19, 2016

A: Your son may have a condition called Osgood-Schlatter disease. It is a condition where the quadriceps muscle (thigh) contraction pulls on the patellar tendon and causes the bone to pull away (avulse) from the tibial tuberosity (bump on the lower leg right below the knee cap). Healing results in excess bone growth (large bump) and irritation of the tendon which make it painful to touch and painful to contract the quadricep muscle. It occurs between the ages of 9-16, more often in boys and more often in active children. Physical Therapy will assist with pain, stretching and strengthening.