Kelly Brook is living with crippling back pain because of her huge boobs.

The 40-year-old lost weight after becoming an ambassador for Slimfast and thought that would help the problem.

But while her figure has shrunk, her boobs are not getting any smaller.

That means her back pain is now a long-term problem.

A source close to the star said: “Kelly’s back troubles have been going on for a while now.

“She often tells friends how painful it is.

(Image: Instagram/Kelly Brook)

“Her boobs are really heavy and they put a lot of strain on her back.

“She often talks about how much effort it is to carry them around all the time. It’s not as if she has a choice in the matter.”

They added: “She’s been exercising a lot because she thought that would help, but it hasn’t.

“She is now thinking about other ways of solving the problem.”

Kelly’s breasts are a 34FF, meaning they are likely to weigh at least half a stone.

Experts have described having a pair that size as a “24/7 workout” because it is so tough carrying them around.

(Image: PA)

Large boobs can also cause neck pain and severe headaches.

Women who suffer sometimes solve the problem by getting a breast reduction.

Plastic surgeon Matthew Schulman has seen countless women benefit from the procedure.

He said: “Breast reduction surgery has one of the highest satisfaction rates among all plastic surgery procedures because of the immediate improvement in lifestyle. Women are able to be more active, live pain-free and have an improved quality of life.”

Stars who have reportedly had reductions include rapper Queen Latifah, actress Drew Barrymore and singer Marie Osmond.

(Image: Kelly Brook/Lipstick Syndication)

Other ways women can tackle the issue include doing yoga.

Kelly’s massive boobs have helped make her one of the nation’s favourite pin-ups over the past 20 years.

Every year she shows off her sensational curves in her official calendar.

And it always flies off the shelves because she has got such a big fan base.

Our source said: “Kelly has always loved her boobs and she knows how popular her photoshoots are too.

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“But that really doesn’t help when she’s in agony.”

● The official 2020 Kelly Brook calendar is on sale in shops or at danilo.com.