Hello,
For the bug bite as you are not sure whether it was due to a spider bite, so it needs to be evaluated. Till then apply some cold compresses and then apply calamine lotion. It helps in soothing the skin.
You can take some antihistaminic like Benadryl or Claritin. Although the bite may be itchy, avoid scratching it because you may damage the skin, and allow bacteria to get in, leading to infection. Also steroids may be needed which are available under prescription.
I hope it helps. Take care and regards.
Hi, is it a blister like eruption? My spider bit was like that and actually resembled shingles. I'd have it looked at. If it turns bright red and purple black and blue, run. I wouldn't take a chance at all.
C~