Avoid sun exposure between 10 a.m. and 4 p.m. The sun's rays are strongest during these hours.Cover up. Wear tightly woven clothing that covers your arms and legs. Consider wearing clothing specially designed to provide sun protection. A broad-brimmed hat and sunglasses with a high UV-protection rating also will help.
Use sunscreen frequently and liberally. Apply a broad-spectrum sunscreen with an SPF of at least 15. The American Academy of Dermatology recommends using a broad-spectrum, water-resistant sunscreen with an SPF of at least 30.
Reapply sunscreen every two hours — or more often if you're swimming or perspiring.
consult dermatologist if problem persists long