Itching, hardness, and swelling caused by mosquito bites may be due to factors such as neglecting personal hygiene, infection, and allergy. If the patient’s symptoms are severe, it is necessary to go to the hospital in time and follow the doctor’s advice for medication treatment.

Neglecting personal hygiene: After being bitten by mosquitoes or insects, if you scratch your skin too much with your hands, it will cause local pain, swelling, and hard bumps. You can clean the wound with warm water to reduce the growth of bacteria in the wound and improve the symptoms.

Infection: After being bitten by mosquitoes or insects, the local skin’s immune ability will decrease, making it easy to be infected. The main manifestations are itching, pain, and swelling, which can be treated with external anti-inflammatory ointments, such as erythromycin ointment, clotrimazole hydrochloride cream, and mupirocin ointment, etc.

Allergy: The manifestations of skin allergy include itching, swelling, and hard bumps. Antihistamines can be taken orally under the guidance of a doctor, such as loratadine tablets, diphenhydramine hydrochloride tablets, and ebastine tablets, etc.