I just joined this site after searching myself for 'sore underarm and breasts'. Im expereincing the exact same thing. I thought last night when I had a sore underarm it too was because of a new shaver, my friend suggested it might be an ingrown hair. I cant see any lumps or anything. Then just today I realised both my breasts are really sore too touch, so now Im confused. If you fibd out what the problem is , please let me know. Though I don't want to let mine get too bad so will have to go to the doctors. Do you have any other odd things.. I've had blocked ears past couple of days too...
I was beginning to worry I could be pregnant as I haven't had sore breasts since my last child. But I had my period a week ago.
PS: Ive just been thinking my neck feel swollen now that I think about it. I may have glandular fever! I better go to doctors sooner than later.