<s>[INST] I have a hard lump on my inner thigh next to my testicles with a sort of trail coming from it like a tunnel under the skin that I can feel is hollow as if its been eaten away almost. The skin feels really thin along this trail and the lump is purplish and sore to touch [/INST] Hi, dairy have gone through your question. I can understand your concern. You may have some soft tissue tumor like lipoma, neurofibroma or hematoma or other soft tissue tumor.  Chances of benign lesion is more.  You should go for fine needle aspiration cytology or biopsy.  It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>