Why did I suddenly develop body odor?

Generally, the main causes of sudden onset of body odor (bromhidrosis) include hormonal changes during puberty, strenuous exercise or exposure to high temperatures, bacterial folliculitis in the armpits, hyperhidrosis, and diabetes. If discomfort occurs, it is recommended to seek timely medical evaluation and diagnosis at a regular hospital. Detailed analysis is as follows:

1. Hormonal Changes During Puberty

During puberty, increased levels of androgens stimulate the development of apocrine sweat glands under the arms and increase secretions. These secretions are easily broken down by bacteria, producing odor and leading to sudden onset of body odor. It is important to wear breathable cotton clothing regularly, use mild body washes to clean the underarms periodically, reduce bacterial growth, and alleviate odor.

2. Strenuous Exercise or Exposure to High Temperatures

Strenuous exercise or prolonged exposure to high temperatures causes excessive sweating. Sweat in the underarm area cannot evaporate in time, allowing bacteria to multiply and break down organic substances in sweat, producing a pungent odor. After exercising, it is important to shower promptly and change into dry clothes to avoid prolonged sweat retention. During hot weather, try to reduce outdoor activities, choose cooler environments, and decrease perspiration.

3. Bacterial Folliculitis in the Armpits

Infection of hair follicles in the armpit area by bacteria causes inflammation, which alters the composition of sweat. Secretions caused by the infection mix with sweat and are further broken down by bacteria, intensifying the odor and causing sudden body odor. Under medical guidance, topical medications such as mupirocin ointment, fusidic acid cream, or clindamycin gel can be applied to the affected area to inhibit bacterial infection. It is also important to keep the underarm area dry and avoid scratching to prevent follicle irritation.

4. Hyperhidrosis

Excessive sweat gland activity causes underarm sweating far beyond normal levels. The large amount of sweat provides favorable conditions for bacterial growth, potentially causing sudden body odor. In severe cases, sympathectomy via thoracoscopic surgery may be used to regulate sweat gland function and reduce perspiration.

5. Diabetes

Poorly controlled blood sugar levels lead to metabolic byproducts being excreted through sweat. Substances such as ketones in sweat are broken down by bacteria, producing a distinct odor and resulting in sudden body odor. Under medical supervision, medications such as metformin tablets, glimepiride tablets, or insulin injections can be used to control blood sugar levels.

In daily life, it is important to maintain clean and dry underarms and avoid frequent use of harsh cleansing products. Diet-wise, reduce intake of strongly scented foods like garlic and onions. Maintain a regular sleep schedule and avoid staying up late, which can disrupt the body's metabolism. If the odor persists or worsens, seek medical attention promptly to identify the underlying cause.