There may be softening of your cartilage known as chondromalacia. Wear and tear is unlikely at your age as you are 13 years old.
Take vit d supplements. Avoid jumping/ running/ squatting.
Ice fomentation. Quadriceps strengthening and hamstring stretches.
If you dont get relief can consult me through video or in clinic appointment.
Answered2021-10-06 12:21:57
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