According to the theory of Chinese medicine, solar dermatitis belongs to the category of “sun disease”, also known as “sun sores”, which is mainly caused by exposure to the sun, causing the skin to be invaded by Yang heat and dampness, and wind and dampness heat in the skin to become itchy rash, eczema or erythema. Generally, this skin damage is an acute inflammatory reaction caused by excessive exposure to medium-wave ultraviolet light in sunlight, which is superficial and limited to the epidermis, causing necrosis of epidermal keratinocytes and releasing mediators that lead to dermal vasodilation and tissue edema, followed by accelerated pigment synthesis by melanocytes and deepening of skin pigmentation. For solar dermatitis, we must first focus on prevention: 1, take protective measures, do not expose the exposed parts of the skin to direct sunlight, use sunscreen; 2, it is advisable to eat light food to clear heat and detoxification, fundamentally change the physical factors formed by photosensitive state; 3, keep the spirit of relaxation, in order to facilitate the smooth flow of qi and blood, promote skin metabolism. For the skin of solar dermatitis has occurred, we should actively take maintenance and repair measures, from the inside and outside the conditioning, in terms of drinking water, can be used under professional guidance with plate blue root or big green leaf brewing water for tea, to play a role in clearing heat and detoxifying dry dampness. In the skin care repair, we can choose the beauty salon in the professional solar dermatitis repair treatment: 1, clean; 2, deep cleaning; 3, cold spray; 4, special effects mask. In the whole care must be prohibited massage, reduce the external stimulation of the skin. Certain photosensitive substances such as internal sulfa drugs, eating a certain kind of ash, rape, acacia flowers containing more porphyrins inside can increase a person’s sensitivity to sunlight, medically called heliodermatitis and phytogenic heliodermatitis. Symptoms such as redness, swelling, burning and tingling pain in the sunburned area appear. In severe cases, blistering and eyelid swelling may occur. Prevention is mainly concerned with avoiding photosensitive substances and direct sunlight. Treatment can take chloroquine, vitamin B2, C, nicotinamide, and in severe cases, hormones and oral paracetamol.