Final answer:
Multiple sclerosis symptoms typically begin gradually and worsen over time. It mainly affects the central nervous system, causing fatigue, vision impairments, and muscle weakness, with younger adults, particularly women, being more susceptible.
Step-by-step explanation:
Symptoms of multiple sclerosis (MS) usually begin gradually and progress slowly over time. MS is a chronic, often disabling disease that attacks the central nervous system, which is made up of the brain, spinal cord, and optic nerves. It causes a variety of symptoms, such as fatigue, vision problems, muscle weakness, loss of balance, and sensations of tingling or numbness, known as neuropathy. Although the exact cause of MS is unknown, it is more common in younger adults and is more frequent in women than in men. It can also be driven by factors such as infection, environmental influences, and genetics.