<s>[INST] Hi, I have a golf ball sized lump next to my ankle bone (behind) on both legs.  There is no pain or tenderness.  I have had many tests from 5 different doctors. I have had xrays, checked my heart, veins, bones - no diagnosis.....help!!!  I am 67 yrs. old, 5'4" tall, weigh 160 lbs, good health. I am not on any medication. [/INST] Hi,Thanks for the query to HCM.-I studied your query in depth and understood your concerns.-Cause and Treatment-of the lump on both legs near ankles--In your case the cause mostly is -Keratodermata-which are the callosities due to ankle bone friction with the shoes.Cure of it is with following health tips-a-Reduce the weightb-Jogging for 20 mths per day at home.c-Urea moisturing lotion locally at night daily.d-Vaseline lubricant locally morning / eveningHope this would resolve this tricky problem for which you spent a lot other wise, as all the tests are normal without any benefit to you.This would help you to plan treatment with your doctor.Don't worry and things will settleHope this would resolve your query.Welcome further for any query in this regard.Wishing you a fast recovery.Don't forget to Write a good and strong  review ASAP for the benefit of other patients.Have a Good Day. </s>