I agree with learner--inverted nipples are normal. This might be TMI...but just to make you feel better about how common it is...after my children were born and I was trying to breast feed, when my breasts became engorged, my nipples inverted. They have "shields" for this that draws them out. So, no worries. If devices exist to fix this, then lots of women must have them!!!
That doesnt sound like breast cancer... Have you been putting lotion on? That helps when Im dry.. Have you changed ur detergent? That could cause irritation. An inverted nipple is also normal.. Doesnt sound like too much to worry about. If it continues to bother you see ur doctor.
Could it be you might be pregnant? I remember with a couple
of my pregnancies that I had alot of itching. Also, sometimes
my bra causes me to itch. Lotion is a good idea.