I am 28 years old. I get pain and itching in nipples.Though not regular the itching is not bearable. The pain has started recently and usually its for some time only. I am unmarried and am not under any medication. I had been to doctor(gynecologist and surgeon) both said its due to boils on my breast and allergy due to bra material or unclean or wet bra use.I wash my bras in warm water daily,but have shifted from cotton bra to synthetic. But now I have shifted back to cotton.The itching started one year back and was fine after medication but kept coming back. Now there is slight pain on both nipples and in left breast. My nipples and surrounding area become dry and the skin is like cracked out of dryness. And also I have observed that my left breast has grown more in size in last year,when i told this to doctor she told me that it is common due to weight increase. Any lump is not felt so far. Is this serious?I am too worried as its not stopping at all I feel so uncomfortable. Please suggest what I should do.