Celebrities you didn't know live with chronic illnesses -

When it comes to health, people tend to be quite private...

Famous or not, many people suffer chronic or rare illnesses. Some celebrities have been through tough times before discovering that they suffer from serious illnesses, which are in some cases incurable.

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Whoopi Goldberg - The actress suffers from migraines.

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Ashley Olsen - The actress has suffered from Lyme disease, which can result in debilitating life-long symptoms. A surprisingly large number of celebrities have also struggled with the illness.

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Selena Gomez - The singer and actress is known to suffer from Lupus.

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Halle Berry - The actress has suffered from type 2 diabetes since she was 23.

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Pamela Anderson - The actress revealed that she suffers from Hepatitis C, which she contracted from using a contaminated tattoo needle.

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Sia - The singer has revealed that she suffers from Graves' disease, an autoimmune disease which results in irregular thyroid function.

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Avril Lavigne - The singer has also suffered from Lyme Disease.

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Jimmy Kimmel - The presenter has disclosed in interviews that he suffers from narcolepsy.

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Miley Cyrus - The singer revealed that she suffers from tachycardia, a heartbeat which is faster than normal.

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Katie Leclerc - The actress revealed that she suffers from Ménière disease, an inner ear disorder which can cause tinnitus and vertigo.

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Kristen Chenoweth - The actress has disclosed in interviews that she also suffers from Ménière disease.

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Venus Williams - The athlete has been diagnosed with Sjögren syndrome, an autoimmune disease.

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Michael J. Fox - The actor suffers from Parkinson's.

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Simon Cowell - Music mogul has had to drop out of television appearances because he suffers from migraines.

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Halsey - The American singer has spoken out about her struggle with endometriosis.

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Toni Braxton - The singer revealed that she suffers from Lupus.

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Nick Jonas - The singer suffers from type 1 diabetes.

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Susan Sarandon - Internationally renowned actress Susan Sarandon suffers from endometriosis.

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Ben Affleck - The Batman star has said that he suffers from migraines.

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Elizabeth Hasselbeck - The presenter suffers from coeliac disease.

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Thalía - The singer suffers from the effects of Lyme disease.

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Jack Osbourne - Jack Osbourne suffers from multiple sclerosis.

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Lil Wayne - The rapper has revealed that he suffers from epilepsy.

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Cher - The singer has disclosed that she has the Epstein-Barr virus and has been suffering from it for decades.

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Nick Cannon - The entertainer suffers from lupus, which has resulted in kidney problems.

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Gigi Hadid - The American model has revealed on social media that she suffers from Hashimoto disease, a chronic illness which affects the thyroid.

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Lady Gaga - The American superstar suffers from fibromyalgia.

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Kim Kardashian - The reality TV star and entrepreneur suffers from psoriasis.

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Bella Hadid - The model has revealed that she has also suffered from Lyme disease.

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Lisa Kudrow - 'Friends' icon Lisa Kudrow also suffers from migraines.

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Elle Macpherson - The Australian supermodel suffers from migraines.

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Sharon Stone - 'Basic Instinct' icon Sharon Stone has type 1 diabetes.

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Kanye West - Rapper Kanye West is also reportedly afflicted by migraines. In 2018, he opened up about his mental health, revealing that he's bipolar.

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Salma Hayek - The Mexican actress has been diagnosed with type 2 diabetes.

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Chaka Khan - The singer has type 2 diabetes.

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Dolly Parton - The 9 to 5 singer struggles with endometriosis.

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Jennifer Morrison - The 'House' actress suffers from migraines.

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Theresa May - British prime minister Theresa May has type 1 diabetes.

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Jaime King - Actress Jaime King has been diagnosed with endometriosis.

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Liam Gallagher - Oasis frontman Liam Gallagher suffers from psoriasis.

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Lena Dunham - Lena Dunham has been very open about her struggles with endometriosis.

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Tom Hanks - Legendary actor Tom Hanks has been diagnosed with type 2 diabetes.

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Daisy Ridley - 'Star Wars' actress Daisy Ridley suffers from endometriosis.

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Sarah Hyland - The 'Modern Family' actress suffers from kidney dysplasia.

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Janet Jackson - Pop superstar Janet Jackson also suffers from migraines.

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