Hi doctor, I was in myrtle beach 6/29-7/6 last wk & something - an inset / spider? must have bitten me 6/30 on the left side of my belly. A red rash developed, then it slowly spread over next few days to about 4 in diamater. I cleaned it out with peroxide. Feeling no pain on the site of the bite. now the rash is only slightly discolored but it has a spread to about 6 . Also for the last few wks later I have been very achy especially on the upper arm & left shoulder. Alleve has been helping but need at least 2-4 p/day... It s not a tick bite as there is no rings in the rash, the atcual spot of the bite has no stinger but is visible. What can it be & do I need to go se my doctor? Thnaks !!