Wearing a thong in hot weather could increase the risk of thrush, doctors say.
Tight underwear increases the risk of yeast infections, which are already more common in high temperatures.
Mercury was above 32C yesterday and is expected to stay above 30C in parts of the UK for the rest of the week.
Experts say your choice of underwear could affect how likely you are to get an infection.
dr Anne Henderson, a consultant gynecologist, is collaborating Canestensaid you should try to wear loose-fitting underpants to reduce your risk.
She said: “There is evidence that tighter underwear, such as thong pants, can increase the risk of local irritation and infections such as thrush and cystitis.”
“Of course, this depends on the exact style of trousers and the fabric used.
“Lower styles like French panties can be beneficial for women with recurring vulva-vaginal issues, but again, personal choice plays a role.”
“I would always recommend women not to wear underwear at night unless there is a specific need, such as during menstruation when it might be more comfortable to wear underwear while using toiletries.”
Thrush is a common yeast infection caused by Candida fungus, which is normally found in the vagina but is kept under control by normal bacteria.
Changes in bacterial balance, which can be caused by stress, pregnancy or antibiotics, can lead to the growth of the fungus.
This can cause white discharge, itching, pain during sex or when peeing, and redness in women, according to the NHS.
Men can also experience an unpleasant odor and difficulty retracting the foreskin.
Infections are usually treated with antifungal medications, but repeated yeast infections may mean you need to see your GP.
dr Henderson said wearing underwear made from natural fibers like cotton can help protect against infection.
She said: “This is preferable as they have the ability to breathe while many synthetic fibers do not.”
You should also make sure that you are
Henderson said: “The frequency with which you change your underwear during the day is partly a matter of personal choice. However, I would advise most women to change their underwear at least every 24 hours to prevent the growth of organisms like yeast or candida.”
“If you think you should change your underwear more often, consider your activity level throughout the day.
“If you exercise a lot in the morning, it may be best to change into a new pair of underwear after you shower, as exercise inevitably leads to increased sweat production in the groin area.”