Why the symptoms of chiari malformations worse on some days, and better on others?

Symptoms: This malformation is due to pressure in the brain pushing down on the back portion, the cerebellum. Headaches, nausea, dizziness, muscle weakness, and ringing in the ears (tinnitis). Other neurological symptoms, such as restless leg syndrome, sleep apnea, problems with swallowing. An MRI of the head and specialist care by a neurologist will help to diagnose and treat this problem.

Depends on activity: If you are straining and lifting heavy amounts, you could have more headaches and numbness/tingling. Some people can have dizziness and passing out with exertion. Days in which there is no exertion may be associated with less headache and other symptoms. Some patients have constant symptoms because the cerebellar position does not change for them with position or activity.