Mamacat
I have similar issues to you. I've had bumps under the skin for few years. On arms only. I don't know if they are fatty lipomas or calcium deposits or what, never got them checked out. They are painful to press, maybe lump presses on nerves. I had high tissue calcium due to lack of calcitonin, so wonder if it could be calcium deposits.
They don't move under the skin. I also wonder if they are the result of the body throwing the toxins to the outer extremities of the body.
I've got some weird symptoms from hypo. One is Orange discolouration on upper eyelids, have you experienced that. I have to wear concealer.
I used to be pretty healthy before menopause and hypo, now it is one long battle.