My boyfriend had started out a couple of days ago with a red, sore rectal area surrounding his sphincter. Then it became bright red, appearing similar to a chemical burn.
Upon analyzing his rectal area, it seems he has blister-like lesions. They appear to be white under the skin but unlike a pimple of any sort. They are not painful. And the redness seems to be subsiding somewhat.
We are wondering what could this be from, and what can be done about it? We do not engage in any alternative sexual activities.