u/I_am_on_Sapphire

59F I discovered a lump on my upper thigh, right in the area where leg hole of my underwear would sit on the leg. Like it's almost in the crease where the leg joins the torso but actually on the leg. (I hope that makes sense) I discovered it after losing about 40 pounds, about a year ago. At first it was small and didn't bother me, but in the last few days it has suddenly gotten bigger and is mildly painful. My question is which doctor do I go to... Primary care, dermatologist or urgent care. I'm in the US.

Edit: After posting this I searched for "what is the groin" to be sure I was using the right description and discovered that I might be dealing with a lymph node. I will be going to my primary doctor ASAP.