What causes lumps on the body that look like mosquito bites?

Bumps appearing on the body resembling mosquito bites can be caused by various factors. Urticaria (hives) is one common cause; it is characterized by the rapid appearance of raised wheals of varying sizes and shapes on the skin and may be related to food, medications, physical factors (such as cold or heat stimulation, pressure), or emotional stress. Insect bite dermatitis is another possible cause, which is an allergic reaction following insect bites and results in localized red, swollen, and itchy bumps. Additionally, other skin conditions such as eczema and folliculitis may also cause similar symptoms. It is recommended to seek timely medical attention to determine the exact cause through professional examination and diagnosis by a physician, and to undergo appropriate treatment under medical guidance.