It's because certain foods contain sulfur-like compounds, which are particularly potent. They are also the reason why your B.O. might smell like onions, even when you haven't eaten any. Look at tweaking your diet to reduce the intake of these strong-smelling foods.
When the sweat from your glands meets the bacteria on your skin, it breaks down into products called thioalcohols. The thioalcohols give off a strong, often sulfurous scent that can also be comparable to onions or meat.
When you have apocrine bromhidrosis, body odor is the byproduct of lipid-rich apocrine gland sweat mixing with skin bacteria. When these two ingredients come together, they produce thioalcohols -- compounds that smell like sulfur, onions or raw meat .
A Trichomonas infection can often be accompanied by a foul-smelling odour from the vagina, which can, in some instances, smell like onions. Trichomonas is transmitted through sexual contact with an infected person, principally by vaginal sex, but some very sporadic cases have been seen in, anal and oral sex.
Diabetes: Diabetes is one of the most well-known health conditions linked to changes in body odor. People with uncontrolled diabetes can experience a fruity or acetone-like smell (think nail polish remover) on their breath or skin.
Rarely, people can have bad breath because of organ failure. A person with kidney failure may have breath that smells like ammonia or urine. Serious liver disease can make breath smell musty or like garlic and rotten eggs. Compounds that are transported through the blood can also be released through your sweat glands.
Maintaining good vaginal hygiene can be as simple as washing the area daily with warm water and unscented soap to remove dead skin and dried sweat. Additionally, if sweating is causing an unpleasant vaginal odor, try to avoid wearing tight clothes to allow for more air circulation around the vagina.
Mycetinis scorodonius (MushroomExpert.Com) Lots of mushrooms have peculiar and distinctive odors but this little guy, along with a couple of his close relatives, reeks of garlic and onions--so much so, in fact, that you can sometimes smell the tiny little things in the woods before you see them.
Trimethylaminuria (TMAU) is a rare disorder in which the body is not able to metabolize the chemical trimethylamine, and this causes body odor.
Carbon monoxide doesn't smell like anything, and yet it can be absorbed by the human body in minutes, leading to unconsciousness, illness, or death.
While thyroid disorders don't directly cause sour-smelling sweat at night, a change in thyroid hormone production can impact the rate of sweating. In turn, more sweat can result in body odor.
A zinc deficiency may occur due to underactive thyroid hormone (hypothyroidism) that produces few thyroid hormones and affect the detoxification process, resulting in body odour.
At 60 min after cutting the OAV of propanethiol is approximately 20 times the OAV of dipropyl disulfide (approximately 28,000 for propanethiol and 1,400 for dipropyldisulfide). This point to that propanethiol is the main compound responsible for onion odor.
Product build-up. Sometimes, the products you're using can actually contribute to the problem. If you're not rinsing off your soap or body wash completely, it can mix with sweat and bacteria, creating a perfect storm for odor.
Apocrine bromhidrosis – It is the most common type of bromhidrosis. It causes excessive odour in the genital areas and armpits. This odour occurs when skin bacteria mix with sweat from the apocrine glands, leaving a smell similar to raw meat, sulphur or onions.
Sexually Transmitted Infections (STIs)
A strong, onion-smelling vaginal odor and thick yellow discharge indicate the presence of a Sexually Transmitted Infection (STI), such as Gonorrhea or Chlamydia. Other signs that may help you come to this diagnosis are vaginal itching and discomfort during urination.
Thioalcohols get their stinky odor from sulfur and, despite being present in only trace amounts, are some of the most pungent VOCs produced. 3-methyl-3-sulfanylhexan-1-ol (3M3SH) is a thioalcohol, produced by Staphylococcus hominis, which makes the underarms smell like rotten onions or meat.
If you have diabetes, a change in body odor could be a sign of diabetes-related ketoacidosis. High ketone levels cause your blood to become acidic and your body odor to be fruity. In the case of liver or kidney disease, your odor may give off a bleach-like smell due to toxin buildup in your body.
Sweat is a combination of water, salt, and other chemicals. When it comes into contact with bacteria on the skin, it produces an odor. fungal infections: Fungal infections thrive in warm, moist areas, such as the groin area and inner thighs. They can cause a red, itchy rash and produce an unpleasant odor.
Healthcare providers who recognize the smell of fetor hepaticus have described it as musty, pungent, oddly sweet and occasionally fecal (poop-like).
A strong onion-like odor may not always be a sign of an STI and could instead be caused by other factors like body odor, diet, or a forgotten tampon. Other causes of onion-like vaginal odor are: Poor hygiene: Excess discharge or improper cleaning after urination.