YES! I have had this. I had it before I ever had Mirena while I was on regular birth control pills. I went to a dermatologist and had a biopsy done.
It is called Erythema nodosum. Mine was caused from a over abundance of estrogen which I now know(because of this forum) is called Estrogen Dominance. The only solution for me was to go off the pill.
Erythema nodosum is a type of skin inflammation that is located in a certain portion of the fatty layer of skin. Erythema nodosum (also called EN) results in reddish, painful, tender lumps most commonly located in the front of the legs below the knees. The tender lumps, or nodules, of erythema nodosum range in size from 1 to 5 centimeters. The nodular swelling is caused by a special pattern of inflammation in the fatty layer of skin.