If red hard bumps appear in summer, accompanied by itching symptoms, may be due to mosquito bites, patients can use flower lotion to temporarily stop itching. If the itching is not significantly relieved, or there is a large red swelling, it may also be due to mites, fleas, bed bugs and other parasitic bites, the common clinical conditions include the following: 1. mites: if the patient has intense itching, and the itchy area appears red papules or nodules, and the skin surface can be seen tunnel-like lesions, usually considered mite infection; 2. fleas: patients with domestic pets, if the pet long-term If the pet is active in bed for a long time, there may be flea bites on the skin causing itching symptoms. The lesions generally appear as red papules the size of soybeans, and some patients may also have large blisters; 3, bed bugs: wooden furniture may cause bed bugs to gather, and bed bug bites can cause intense itching, redness and swelling. Long-term bed bug bite patients may also appear anemic, weak, dizzy, insomnia and other performance. General mosquito bites can be used soap and water, baking soda solution or compounded stove glycolic lotion, etc., to clean the local lesion area. Patients with more serious itching symptoms can also apply topical salicylic acid ointment, Bactrim ointment, etc. for relief. If the symptoms of redness and itching are severe, antihistamines such as loratadine and cetirizine can be taken, or glucocorticoids can be taken as prescribed by the doctor. In addition, in the summer, you should pay attention to regular change of bed sheets and covers, regular drying of clothes and blankets, etc. Patients who have pets at home should pay attention to regular cleaning of pets to avoid the gathering of various parasites.