Does shaving underarm hair cause body odor?

Shaving underarm hair generally does not cause body odor. The detailed explanation is as follows:

Underarm hair itself does not produce odor; it serves only to reduce skin friction in the armpit area and assist in sweat evaporation. The root cause of body odor lies in the sweat secreted by apocrine glands in the armpit. This sweat produces a distinct odor only after being broken down by bacteria. Shaving underarm hair neither affects the secretory function of the apocrine glands nor leads to bacterial overgrowth that causes odor. Some people may perceive changes in odor after shaving underarm hair, which is mostly due to the exposed underarm skin altering the way sweat evaporates or affecting the local hygiene condition, making previously mild odors more noticeable. This perceived odor change is not directly caused by shaving underarm hair.

Before shaving underarm hair, ensure the tools and underarm skin are clean, and avoid using dull instruments that may cause skin damage. After shaving, if the underarm skin feels dry and tight, you may apply non-irritating moisturizing products. If noticeable and persistent odor occurs after shaving, enhance underarm hygiene and wear breathable clothing. If the odor does not improve, it is recommended to seek medical advice to check for possible underlying causes related to body odor.