Hi, i have had a hard irregular shaped lump in my groin area (the size of a very large tadpole almost) for the last 5 months which is continuing to grow quite slowly. There is no pain to the lump, only when i catch it, and the skin surface appears very dark purple almost black above the lump. In the last week or so, the skin has started to change appearance, become dry almost and extremely itchy. I went to my doctor 3 months ago and he said he doesn t know what it is! Very wierd, but i can also feel a pulse in it too sometimes, almost like when you cut your finger etc. Im female, 20, hope this is enough detail. Thanks.