Can working in a kitchen as a line cook for 11 years cause multiple sclerosis?

Could make worse: Your work did not cause multiple sclerosis, but the kitchen heat can result in increased symptoms (pseudo-relapse), and increased fatigue. Hopefully, you are taking a potent medicine, but suggest adding vitamin d supplements, if not already using.

No: Neurobiology is gradually inching closer to discovering the cause of MS, but we're not there yet. Epidemiological studies going way back have identified a wide range of demographic factors having to do with race, sex, age, where you lived before your 15th birthday, etc. But you can't blame kitchen work for your MS. I hope that helps you to feel better rather than worse.