When suddenly exposed to strong sunlight, especially in the summer, the skin of acute heliotropic patients can suffer from a lack of protection, triggering acute skin inflammation where the damaged skin becomes red, swollen, itchy, and accompanied by a burning sensation. Skin under less intense sun exposure, some people also develop symptoms such as redness, itching and rash, known as solar allergic dermatosis, with lesions appearing on the exposed skin of the face, back of the hands, cervicothoracic triangle and forearms, with burning and itching sensations. The condition worsens in summer. Therefore, people who work outdoors for a long time should pay attention to good protection measures to avoid long-term exposure to the sun, and can bring a sunshade and apply sunscreen when they go out. People who are exposed to the sun for a long time often develop this disease, so chronic solar dermatitis is common among farmers, fishermen, crew members and other outdoor workers who are middle-aged or older. Patients with chronic solar dermatitis show dry, atrophic, wrinkled skin with pigmented spots and pale white atrophic patches. Some people also develop rashes, often on the face, ears, back of the hands, and forearms. The hot summer months are the peak time for solar dermatitis and timely prevention is key. If the sunburn of solar dermatitis is more serious, with nausea, vomiting, palpitations and other systemic symptoms, you should promptly go to the hospital for treatment. The most important thing is to avoid outdoor activities or reduce the time of activities when the sun is strongest from 10 a.m. to 2 p.m. Avoid sun exposure and pay attention to protection when going out, such as holding an umbrella, wearing a wide-brimmed hat and wearing long-sleeved clothes; if you are outdoors, it is recommended that you routinely apply a sunscreen with a sun protection factor (SPF) of 15 or more, and those with severe photosensitivity need to use a highly effective sunscreen with SPF 30 or more. or higher.