Sonnenbrand, or sunburn, is a skin condition caused by overexposure to ultraviolet (UV) radiation from the sun. It results in redness, pain, and sometimes swelling of the skin. The severity of sunburn can vary, with mild cases causing discomfort and severe cases leading to blisters and peeling. To prevent Sonnenbrand, it is important to use sunscreen with a high SPF, wear protective clothing, and seek shade during peak sun hours. Hydration is also essential, as sunburn can lead to dehydration. If sunburn occurs, soothing lotions and cool compresses can help alleviate symptoms.