Sunscald? Did water get on your peppers and then got burnt by the sun? I have that happen sometimes. I just cut it out and eat the pepper.

I don't think it would be sunscaled because they are well covered with leaves and don't get sun on fruit

I believe that's blossom end rot which, especially in peppers, can happen on the sides of the pepper as well as at the blossom end. The reason? Calcium deficiency, which can come from soil overwatering, and application of high nitrogen fertilizer.

That's what I was wondering... Is the plant ruined and should be pulled or is there somthing I can do for it? And if it has to be pulled will the soil be good or will it infect anything else I plant?

This is a duplicate post of this question. It is BER. It isn't a disease. There is no reason to pull the plant. It goes away all on its own. Lots of info and discussions as well as a FAQ here all about.

Dave