I get these random bump on my body and I

Patient: I get these random bump on my body and I do not know if it caused by a bug bit or if I’m allergic to something.These bump start of small and a little red then in like a hour or so they swell up and itch really badly.It looks like something has bit me but I have bug bomb my house, get my house sprayed and have my house expected for bugs.Also these bumps usually settled down after I get them for around couple month before they pick right back up and it seem like they usually happen in the same area on my body.Another reason I think these bump are not cause by bugs is because it is always just on bump in one location then there will be another bump in a completely different area of my body.

Doctor: