This question was answered on Sat 03, Oct 2009 08:12pm by Dr. Rajgopal, MBBS

Why has my sweat started to smells like onions. I don't eat a lot of them so don't understand why?ThanksKare

    
Asked by karenmallion (Female; 31; asthmatic possible underactive thyroid ) on Fri 02, Oct 2009 01:52pm

Why has my sweat started to smells like onions. I don't eat a lot of them so don't understand why? Thanks Karen

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Answer by Dr. Rajgopal, MBBS  on Sat 03, Oct 2009 08:12pm:

Hi, The cause of body odor along with sweating stems from your body's temperature regulation system, specifically your sweat glands. Our skin has two types of sweat glands. Eccrine glands occur over most of your body and open directly onto the surface of the skin. Apocrine glands develop in areas abundant in hair follicles, such as on your scalp, armpits and groin. When the body temperature rises, the autonomic nervous system stimulates the eccrine glands to secrete fluid onto the surface of our skin, where it cools our body as it evaporates. This fluid (perspiration) is composed mainly of water and salt (sodium chloride) and contains trace amounts of other electrolytes. Apocrine glands, on the other hand, secrete a fatty sweat directly into the tubule of the gland. When one is under emotional stress, the wall of the tubule contracts and the sweat is pushed to the surface of the skin where bacteria begin breaking it down. Most often, it's the bacterial breakdown of apocrine sweat that causes an odor. Management consists of using antiperspirant sprays, deodorants. For best results, apply the antiperspirant at night to the areas most prone to sweating. Please consult a physician if the symptoms persist. Since you have an underactive thyroid, it could be a contributing factor. Hope this helps you. Take care and regards!
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