I've developed small moderatly itchy bumps on my chin, upper arms, and thighs. Everyone I ask says I am having an allergic reaction. I've washed the effected area several times with no result. The only thing that I can think of that would cause a reaction in several places on my body at once is some crab I ate two days ago. The bumps started yesturday on my chin and they showed up on my arms and legs this morning.