Large bump after mosquito bite

Large swellings after mosquito bites are generally caused by skin allergies and can be relieved with topical or oral medications. The specific analysis is as follows:

When a mosquito bites, substances such as histamine and leukotrienes released from the mosquito's body can trigger skin allergies. Mosquito bites increase the permeability of blood vessels in the skin, leading to allergic reactions that manifest as localized bumps, often accompanied by itching. At this stage, under medical guidance, topical applications such as calamine lotion or desonide cream may be used to relieve symptoms and reduce itching, thereby improving the condition. If topical treatments are ineffective, oral antihistamines such as loratadine tablets or cetirizine hydrochloride tablets may be taken as directed by a physician.

In daily life, it is recommended to maintain good hygiene practices, including showering regularly, changing clothes frequently, and keeping indoor environments clean to prevent mosquito breeding. Additionally, avoid scratching the affected area to prevent secondary infections and worsening of symptoms.