The first signs of a sunburn may not appear for a few hours. The full effect to your skin may not appear for 24 hours or longer. Possible symptoms include:
Kaplan LA. Exposure to Radiation from the Sun. In: Auerbach PS. Wilderness Medicine. 5th ed. St. Louis, Mo: Mosby; 2007: chap. 14.
Han A, Maibach HI. Management of acute sunburn. Am J Clin Dermatol. 2004;5(1):39-47.