Mosquito bites to the foot area may cause localized swelling, also known as insect bite dermatitis. After diagnosis, it can be relieved by topical medication, systemic medication, and home care. 1. Topical medication: patients can use glycerite lotion to apply, which can achieve the purpose of astringency and anti-itching. If necessary, glucocorticoid ointment such as hydrocortisone and betamethasone can also be applied to achieve anti-inflammatory and anti-itching effects. 2. Systemic medication: For patients with more severe itching symptoms, antihistamines such as loratadine and cetirizine can be used to achieve the purpose of stopping itching and shorten the duration of the disease. If secondary bacterial infection occurs after itching, antibiotics such as fusidic acid cream can be given appropriately. 3. Family care: After finding insect bite dermatitis, you should avoid going to places with more mosquitoes. For the phenomenon of localized swelling, can also be relieved by ice packs, can play the purpose of swelling and itching. It is recommended that the patient in the diagnosis of insect bite dermatitis, should be based on their own situation, with the doctor to give corresponding treatment and treatment.