Hi Im about 35 weeks pregnant and for the last few weeks I have noticed that my left underarm is puffed up. The right underarm looks normal. The part of the underarm that is puffy is the part closest to my breast. It doesn't hurt and I have not been able to find any lumps. I'm going to ask my doctor but wanted to know if any of you have experienced the same thing, or know what this is. Thanks in advance!