(CNN) — Christina Applegate is marking a milestone on her birthday after revealing her diagnosis of multiple sclerosis in August.
Applegate celebrated her 50th birthday on Thanksgiving with a message to her fans on Twitter. “Yes. Today I turned 50 years old. And I have MS. It has been difficult,” he wrote.
“I send so much love to all of you this day,” Applegate continued. “Many are suffering today, and I am thinking of you. May we find that strength to lift our heads. Mine is currently on my pillow. But I try.”
The multiple sclerosis affects the central nervous system. It is considered an autoimmune disease in which the immune system attacks its own healthy cells. It affects the quality of life and can be disabling.
In her announcement earlier this year, the actress known for her roles in “Bad Moms,” “Married … with Children” and “Dead to Me” shared that living with the disease has not been easy.
“But I have received so much support from people that I know they also have this condition,” Applegate said. “It has been a difficult road. But as we all know, the road continues.”
There is no cure for multiple sclerosis, known as MS, but many people are able to control their symptoms and adapt to new lifestyles after diagnosis.
Researchers believe that the disease is the result of environmental and genetic factors, but the underlying cause is unknown.
CNN’s Jack Guy contributed to this report.