Are they peachy-pink in color, or bright red-yellow?
Tinea Versicolor is a common problem in the summer months caused by an overgrowth of yeast on the skin. It can be peachy, beige, pink, or reddish. Using an anti-dandruff shampoo (Nizoral, Selsun) like a bodywash for a few days can usually clear it up.
http://www.nlm.nih.gov/medlineplus/ency/article/001465.htm