The symptoms of primary-progressive multiple sclerosis are similar to those of secondary-progressive multiple sclerosis. The main symptom of both forms of the condition is a gradual worsening of disability.
This may be experienced through increased:
- Numbness or tingling
- Vision problems, such as double vision
- Spasticity or stiffness of the muscles
- Difficulty controlling the bladder or bowels
- Problems with cognition, such as learning and memory or information processing
- Difficulty with walking and coordination
- Trouble walking
- Muscle weakness
- Mood changes
- Sexual dysfunction
Causes and Risk Factors
Ten percent of all multiple sclerosis patients are diagnosed with PPMS. The cause of PPMS is unknown.
Patients with PPMS tend to be diagnosed in their mid-to-late 30s. The condition affects men and women equally.