Selma Blair reveals the MS symptoms doctors dismissed since she was a kid: ‘It took me 30 years to get an MRI’

The world learned about Selma Blair’s multiple sclerosis diagnosis nearly seven years ago — but the autoimmune disease has been tormenting her for most of her life.

The “Cruel Intentions” actress, now 52, can trace early symptoms back to her childhood, but claims doctors brushed off the red flags for decades.

“It took me 30 years to get an MRI,” Blair said last week during a panel at the second annual Women’s Health Lab, hosted in partnership with Northwell Health’s Katz Institute for Women’s Health.

At the age of 7, Blair lost control of her bladder and use of her right eye and left leg — yet, after ruling out cancer, doctors and family branded her an attention seeker.

What they missed: Juvenile MS, a debilitating disease that affects the central nervous system by disrupting the flow of information within the brain and between the brain and body. 

“If you’re a boy with those symptoms, you get an MRI. If you’re a girl, you’re called ‘crazy’,” Blair told British Vogue in 2023. 

As a child, the “Hellboy” actress would wake up laughing uncontrollably in the middle of the night.

Decades later, those laughs gave way to sudden, uncontrollable spells of sobbing.

“I just thought I was a hugely emotional person,” Blair said. In reality, MS had damaged her frontal lobe — like a brain injury. 

It would be another 40 years until she received the diagnosis.

“[I was] thrilled,” Blair told People earlier this month.

“I felt like people thought it had to be some tragic thing, but I was like, ‘No, you don’t understand,’” she said. “I was feeling tragic inside before.”

Blair, who shares 13-year-old son Arthur with ex Jason Bleick, said she often wondered what was “wrong” with her before the diagnosis.

“I just did not understand how I was so different from people, but yet totally kind of fine-ish,” she told the outlet. “I finally just felt seen.”

Nearly 1 million Americans have been diagnosed with MS, according to the National MS Society. The disease can affect anyone, including children.

You may be at higher risk if you’re female, between 20 and 40, and of Northern European descent, per the Cleveland Clinic.

Doctors don’t know exactly what causes MS, but research suggests that factors like smoking, childhood obesity, low vitamin D levels and genetics could be possible triggers.

Exposure to toxins like secondhand smoke and pesticides — as well as viruses such as Epstein-Barr or mono — may also increase the risk.

Early warning signs of the MS include blurred vision, muscle weakness and numbness.

As the disease progresses, symptoms can range from fatigue and dizziness to trouble with balance, bladder control, mood swings, muscle stiffness and cognitive issues like memory and concentration problems.

Many patients experience periods of remission where signs of the disease fade. While there is no cure, treatments can help manage symptoms and reduce flare-ups.

Last year, Blair revealed she suffered a major relapse after a stem cell transplant — but she’s now in remission thanks to a new provider.

Her doctor — the first woman she’s ever been treated by — took a holistic approach, including factoring in the actress’s early menopause.

“It really did change my life completely,” Blair said at the Women’s Health Lab panel. “We found a way to manage my MS and I am doing really, really well right now.”