Lump in armpit. Taking levothyroxine. Ultrasound done, diagnosed as muscle tissue. Due to hypothyroidism?
Does underarm lump have anything to do with hypothyroidism? Have a large lump under armpit, after ultrasound was told that this was a harmless muscle bundle. This lump appeared just before I was diagnosed with hypothyroidism. I have been on 25 mcg of levothyroxine for 2 months. Just upped to 50mcg last week. Lump has not changed at all.