1) Stop that itch! Few things are more maddening than an itch. And summer is prime time for all kinds of creepy-crawly sensations, often accompanied by mysterious lumps, bumps, cracking, crusting, swelling, and oozing (delightful!). "Most itching has an obvious cause, such as bug bites or dry skin," says Ronald Brancaccio, MD, director of the Skin Institute of New York and clinical professor of dermatology at New York University School of Medicine. "But sometimes an itch or the rash that goes with it can be hard to figure out, even if it has a straightforward cause like an allergic reaction." 2)Heat rash Hot, humid weather brings on this rash, in which clogged sweat ducts trap perspiration under the skin. It shows up as tiny, itchy bumps or blisters, most often in skin folds or places where clothes cause friction. Treat it: Heat rash usually goes away on its own after a few days. Wear lightweight, breathable fabrics to allow sweat to evapo