Why Are My Underwear Often Yellow?

There are many reasons for causing underwear to become yellow, including not paying attention to personal hygiene, or it may be related to organic lesions. For example, not frequently changing underwear can lead to urine residue or menstrual blood residue, which may cause underwear to turn yellow. Inflammation of the urinary system or reproductive system can cause an increase in secretions, making underwear very yellow. Here are some possible reasons:

Human urine is acidic or alkaline and contains waste products and secretions from the body, so urine is usually yellow. Even if you wipe with paper after each urination, there will still be some residue left. Over time, the underwear will gradually turn yellow.

Many women have had the experience of accidentally getting menstrual blood on their underwear during menstruation. Cotton underwear stained with menstrual blood is often difficult to clean thoroughly. After repeated occurrences, the underwear is prone to yellowing.

Microbiologists have found that a dirty pair of underwear carries an average of 0.1 grams of feces, which contains pathogens such as Salmonella and Escherichia coli. Even with normal cleaning and drying, the bacteria on the underwear cannot be completely killed. With prolonged use, the underwear will inevitably accumulate bacteria, leading to yellowing and hardening.

The risk of women developing gynecological diseases increases significantly after marriage. During illness, inflammatory bacteria cause an increase in secretions, which stain the underwear and create stains. These stains become a breeding ground for bacteria. Even after thorough cleaning, there may still be bacterial residue, making such underwear more dangerous to use.