Almost 18 months ago now I got what I think was an insect bite on my arm. It was a red, swollen bump and quite itchy. I left it alone and it went down very slowly, but never went away fully. It just stayed on my arm as a red mark.
Over the past few months it seems to have come back, it did pop a couple of weeks back and a small amount of yellowish stuff came out of it. Now it's just there on my arm, it looks like it has something underneath it but nothing happens if I squeeze it and I'm not sure if it's just scar tissue. I have attached photos.
Has anyone experienced this before or does anyone have any idea what this could be and if it warrants a doctors visit?
I have no idea what could have bitten me 18 months ago for it to cause this.