Hello,

I bought this cactus(don't know the species) about a year ago with no problems. I put it under bright filtered light indoors and water once a month flushing it throughly. Everything looked good until I put it outdoors in only a slightly better spot with more light about 2 weeks ago.

I now randomly noticed there are a bunch of spots growing under the skin! Is this some disease? Or sunburn? It is much more visible right now when I shine the light at an angle. Photos included.

If anyone has the slightest clue, please chime in! This is my favorite cactus and hopefully it can recover.

Thanks.