Actress Jamie-Lynn Sigler told the world today that she has multiple sclerosis, an autoimmune disease that can affect people very differently day-to-day and over the course of a lifetime.

Fatigue is one of the most common symptoms of the disease, said Rosalind Kalb, vice president of Healthcare Information & Resources at the National MS Society.

“T is no one face of MS, it’s a highly variable disease,” Kalb said.

MS is typically a relapsing-remitting disease with periods of new symptoms or relapses that develop over days or weeks and then usually improve partially or completely, say May Clinic experts.

Kalb said a thorough physical exam, a detailed health history, and magnetic resonance imaging are among the tests used to diagnose the disease.

MS patients should ideally work with a team of health care experts, including their primary care doctor to help them manage the disease successfully.

Kalb’s advice to the MS patients: “For anybody, diagnosed at whatever age, figure out what your disease is. It’s your own MS. You need to figure out in what ways it’s affecting you. Get educated about it and the options out t to help you, and talk to your health care provider to talk about any symptoms you’re having and how they’re impacting your life. If MS is getting in the way, we want people to get the help they need.”

Jamie Lynn Sigler