Why did I suddenly develop axillary odor these two days?

Sudden onset of axillary odor over the past two days may be related to multiple factors. Excessive sweating is a common cause, particularly in hot weather, when wearing heavy clothing, or after vigorous exercise. The armpits are prone to sweating, and if not cleaned promptly, odor may develop. Bacterial infection could also lead to axillary odor, as the moist armpit environment promotes bacterial growth. These bacteria break down organic substances in sweat, producing an unpleasant smell. Additionally, genetic factors may play a role. If there is a family history of axillary odor, individuals may suddenly develop it during puberty or under certain specific conditions. Diet and lifestyle habits can also influence the occurrence of axillary odor—for example, consuming spicy or irritating foods, or having poor personal hygiene habits.