Is it normal to have odor under the armpits?

In general, if underarm odor is mild and there are no signs of infection, it may be normal. However, if the underarm odor is strong or accompanied by symptoms such as redness and swelling, it could indicate an abnormal condition. If discomfort occurs, it is recommended to seek timely medical evaluation and receive standardized treatment under a doctor's guidance. Specific analysis is as follows:

If there is only a slight odor under the arms, this is considered normal. Sweat glands in the body secrete sweat during activity. Sweat itself is odorless, but when it comes into contact with bacteria on the skin surface, these bacteria break down proteins in the sweat, producing volatile fatty acids that cause odor.

If underarm odor is pronounced and persistent, or accompanied by other symptoms such as redness, swelling, pain, or discharge, it is considered abnormal. This condition may be related to diseases such as bromhidrosis (body odor), hyperhidrosis (excessive sweating), or hyperthyroidism, and prompt medical consultation is advised to identify and treat the underlying cause.

It is important to maintain good personal hygiene in daily life—showering regularly, using appropriate antiperspirant products, and wearing breathable clothing—to help reduce the occurrence of unpleasant odors.