At 21, Billie Eilish is headlining the Main Stage East at Reading Festival on Sunday, August 27.

In a candid interview with David Letterman on his Netflix present, My Guest Needs No Introduction, Billie opened up about Tourette syndrome.

"If you film me for long enough, you’re gonna see lots of tics," she mentioned.

"These are things you would never notice if you’re just having a conversation with me," Billie added, "however for me, they’re very exhausting."

Revealing that most individuals chortle at her when a tic happens, assuming she is attempting to be humorous, Billie is definitely "incredibly offended".

"What is funny, is so many people have it that you would never know,” Billie said.

"A pair [of] artists got here ahead and mentioned, 'I’ve truly at all times had Tourette’s.'

"And I’m not gonna out them because they don’t wanna talk about it, but that was actually really interesting to me."

What is Tourette's syndrome?

The NHS explains: "Tourette's syndrome is a condition that causes a person to make involuntary sounds and movements called tics."

Examples of bodily tics embody:

• Blinking
• Eye rolling
• Grimacing
• Shoulder shrugging
• Jerking of the pinnacle or limbs
• Jumping
• Twirling
• Touching objects and different individuals.
• Vocal tics can embody:
• Grunting
• Throat clearing
• Whistling
• Coughing
• Tongue clicking
• Animal sounds
• Saying random phrases and phrases
• Repeating a sound, phrase or phrase
• Swearing.

Typically starting in childhood, the tics have a tendency to enhance over time.

However, when feeling harassed, anxious or drained, tics could worsen.

The well being physique provides: "Most people with Tourette's syndrome experience a strong urge before a tic."

This sensation has been in comparison with the highly effective urge to itch or sneeze.

When individuals focus they're able to management their tics, however it may be "tiring", the NHS says.

There isn't any remedy for Tourette's syndrome, however behavioural remedy and drugs can be found.