Milky sweat is often caused by a mixture of sweat and other substances produced by your body. It's not typically a cause for concern, but understanding its origin can help alleviate any anxieties.
Understanding Sweat Glands
Humans have two main types of sweat glands: eccrine and apocrine. Eccrine glands produce the clear, watery sweat that primarily cools the body. In contrast, apocrine glands, located in areas with hair follicles (like armpits and groin), secrete a thicker, milky fluid containing fatty acids and proteins. This milky fluid is often more noticeable after strenuous activity or when experiencing strong emotions like stress, anxiety, or excitement. [1, 5, 7]
Causes of Milky Sweat
- Apocrine Gland Secretion: The primary reason for milky sweat is the release of this thicker secretion from apocrine glands. The milky appearance comes from the fatty acids and proteins in this fluid. [1, 5, 7]
- Combination of Sweat and Body Oils: Milky-appearing sweat may also result from a mixture of your regular sweat and natural skin oils, particularly noticeable on the face after exercise. [3]
- Dehydration is not a cause: Dehydration does not lead to milky-colored sweat, as sweat gland function is based on osmotic pressure differences and not water content. [2]
- Stress, Anxiety, or Excitement: Emotional responses can trigger increased secretion from apocrine glands, leading to more noticeable milky sweat. [1, 5, 7]
When to Seek Medical Advice
While usually harmless, persistently milky or discolored sweat could indicate a rare condition called chromhidrosis, which involves the secretion of colored sweat. If you notice concerning changes in your sweat, consult a doctor. [4]
