Summer is the time of the year when the most skin is exposed. In this season, not only the hot climate, the hot sun, but also the insects and germs that multiply rapidly make summer a high season for dermatological diseases, and the number of dermatology clinics in major hospitals will surge at this time. The main common summer skin diseases are: insect bite dermatitis, solar dermatitis, summer dermatitis, and various fungal and bacterial skin diseases. 1, insect bite dermatitis caused by insects, mosquitoes, poisonous moths, caterpillars, mites and other bites, itchy skin papules, pimples, red spots, blisters, etc.. Different people with different body types react differently to mosquito bites, starting small red dots, puffs and even blisters, blisters are possible. Prevention and treatment: field work, travel, especially in the woods, weedy places or humid places, should reduce skin exposure, or in the skin exposure to apply anti-insect drugs; insect bites, can be used externally cool anti-itch preparations, such as wind oil, flower lotion, etc., can also be applied externally hormonal ointment, if necessary, take antihistamines, pay attention to do not scratch to avoid infection. 2, solar dermatitis Acute phototoxic reaction of the skin caused by excessive exposure to sunlight on exposed parts of the skin, mainly manifested as redness, burning, burning pain, peeling skin, etc.. Usually does not show symptoms immediately, short after 3 to 6 hours, long after 24 hours to present. Prevention and treatment: Wear a hat or umbrella and long-sleeved clothes and pants when going out. When doing outdoor activities for a long time, you can use sunscreen. If you go out to swim or play in the water at the beach, make sure to use sunscreen with a high sun protection factor. If you find your skin has the possibility of sunburn, you can immediately wet compress these parts with cold water, available cold water or ice milk wet compress, about 20 minutes each time. 3, summer dermatitis Continuous hot and muggy environment caused by thermal dermatitis, mostly seen in adults. The performance of erythema, dense patches of papules, papules, the most common in front of both shins, itching significant. Prevention and treatment: keep the environment ventilated and heat dissipation, clean and dry skin. The disease is seasonal, many patients are hot weather onset, the weather will automatically improve. If the dermatitis area is large and particularly itchy, you can take oral anti-allergy drugs or herbal medicines to clear heat and cool the blood, as well as rubbing hormonal ointment or heat-clearing and detoxifying herbal topical lotions. 4. Infectious skin diseases Fungal skin diseases, including various ringworm and sweat spots (pityriasis pilaris), etc., are often aggravated by patients who mistakenly apply hormonal drugs topically; bacterial skin diseases, such as impetigo, folliculitis, boils and dermatitis, are mostly seen in children and diabetic patients in summer. Prevention and treatment: Bathe and change clothes regularly, avoid sweat stains and keep the skin clean. Try to use medication under the guidance of a specialist.