I have a painful flat hard lump under my right nipple for the past 2 months or so. It feels similar to the painful lumps I got in both nipples during puberty. But I'm 34 now and haven't had those lumps in a long time.
I know what most likely caused this sore lump though, I rub them almost every night, sometimes for 2-4 hours at a time because it is very pleasurable in a sexual way. I have been doing this for over a year, but have only developed this painful lump in the past 2 months.
It came on gradually, but seems to shrink a little when I don't rub it for a day or two. And when I do rub it, it seems to soften up after a few minutes and seem less painful. But, in the morning the lump hard again and is more swollen and painful,
What is going on? I only rub them lightly over my shirt and don't ever chaffe my nipples.