Selena Gomez reveals unexpected health diagnosis when asked how she shaves her 'moustache'

Selena Gomez had a very candid response to a fan's bizarre question about her 'moustache'.

Over the years, Gomez has been super open with her fans when it comes to her health.

She's previously discussed her bowel-based condition, commonly referred to as SIBO (which stands for small intestine bacterial overgrowth), her bipolar diagnosis and her lupus diagnosis.

And, just this week, she's shared another health diagnosis when asked by a fan how she shaves her 'moustache'.

Taking to her Instagram Story on Tuesday (16 December), the 33-year-old 'In The Dark' singer couldn't help but giggle as she shared: "Someone made me laugh because they asked me, 'How do you shave your moustache'."

"I was like, 'I totally get it,'" Selena replied, pointing out that she doesn't have a five o'clock shadow, before outlining: "It's actually not!

"It's my melasma. I take care of it, and I treat it, but yeah no, it's there."

The NHS explains that melasma, which is also called 'chloasma', is a common skin condition of adults in which light to dark brown or greyish pigmentation develops, mainly on the face.

"Melasma is simply darker-than-normal skin affecting the cheeks, forehead, upper lip, nose and chin, usually in a symmetrical manner. It may be limited to the cheeks and nose or just occur overlying the jaw. The neck and, rarely, the forearms can also be affected," the health body notes.

Selena Gomez has opened up about her melasma diagnosis (Instagram/@rarebeauty)

An example of melasma (British Skin Foundation)

"Areas of melasma are not raised."

While the exact cause of melasma is not known, factors such as pregnancy, hormonal drugs such as the contraceptive pill, and medical conditions affecting hormone levels could influence it.

Some cosmetics, particularly those containing perfume, can bring on melasma.

Additionally, there is research to suggest that it can be triggered by stress, with the NHS warning that sunshine and the use of sunbeds usually worsen any tendency to melasma.

Over five million Americans have melasma and 90 percent of them are women. It's particularly common during pregnancy, when up to 50 percent of women are affected, according to the British Association of Dermatologists.

Selana seemed to take the fan's question in jest (Instagram/@selenagomez)

While skin affected by melasma isn't itchy or sore, sufferers might not be comfortable with how it looks.

Selena explained that her melasma was due to sun exposure as she continued: "I actually have melasma and a pimple.

"I totally get it. It's actually from the sun, so you'll have to obviously wear sunscreen and be careful,."

The Only Murders in the Building star has previously explained that sunscreen was always going to be an important part of her routine because of her lupus diagnosis in her Vogue Beauty Secrets episode back in 2020