Conversation: The conversation between human and AI assistant.
[|Human|] I have a dark spot on my inner thigh and it s been there for about 8 months. There is a lump undernethe the spot. Sometimes it shoots extremely sharp pains up and down my legs. What could the dark spot be? And what cause the pain? The dark spot is about quater size
[|AI|]  Hi, thanks for sharing your health concern with team Chat Doctor! In the present case of painful dark thigh swelling or lump, if I were your consulting physician, I would consider two or three possibilities like:1. A neurobibroma or dermatofibroma2. A hematoma with recurrent internal bleeding3. An infected sebaceous cysts per your description, it is a benign harmless lesion like a sebaceous cyst or could be common papilloma like some fibroepithelial polyp! In any case this could not be some serous disease or cancer...! Take caution not to get injured there as this might invite infection! If you are still worried, please get examined by a surgeon or get some FNAC like cytological examination or revert to us. Hope you got your answer. Please feel free to write to us if any more queries. Wishing you the best health!