 [ Symptoms ] what is this large hard dark lump under the skin of my inner thigh it does not hurt but i have had it for like 3 months  there is an oval hard lump under my skin on my inner thigh farther back so you can not see it if i am standing it barely sticks out from my skin but is large like wide and long the skin above its darker than the skin around it pretty sure not dermatofibroma i thoughtfrom shaving or my shorts were too tight &were irritating the skin but i have addressed these &it hasnt goneaway it is too low to be a swollen lymph node should it go away on its own time if i use neosporinor should i visit a dr [ Disease ] without the ability to examine this lump first hand it would be impossible to blindly determine what it is and it will go away on its own a description is just not sufficient information to make this important call yes you most definitely need to see a medical provider in order to get an accurate diagnosis