This spontaneously showed up just over the back of my shoulder when I woke up one day, and turned into a rust colored, hard plaque before the thing shriveled and fell off. There was a big pale splotch under that before it scabbed over again. It’s fine this a few times, each time getting smaller. 

Didn’t feel it until day 3, it had grown to 3cm at its largest, and had a knot that was hot to the touch, with dull shooting pain under it that sometimes still comes and goes. I felt this pain all the way in my thyroid area and jawline at times when it was really going, about 3-4 days in. I started to get concerned about it being so close to my head and neck but by day 4-5 it was subsiding.

Doctor was stumped. All tests came back negative for bacteria and flora. She had no idea what this is and is referring to a dermatologist.

I am really, really hoping I do not have brown recluses in my house. This had to have happened while I was asleep in bed. Now that it’s healing it looks suspicious, can anyone speak to what it is? 

I’ve been on doxycycline and prescription antibacterial ointment for 1.5 weeks. It’s healing but it still hurts directly under the wounds and the muscles feel stiff. Not sure if I should be trying to stay on antibiotics and my follow up is after this round ends.

Posting pictures in order of progression.

Brown recluse bite or could this be something else?