Doctors donât know exactly what causes migraines. It appears that migraine headaches may be caused in part by changes in the level of a body chemical called serotonin. Serotonin plays many roles in the body, and it can have an effect on the blood vessels. When serotonin levels are high, blood vessels constrict (shrink).
Average Salary. The average annual salary for physical therapist in the United States is $86,520, which is 103% higher than the average income of Americans. The median pay for PTs is $7,210 per month, $1,663 per week and $41.59 per hour.
1 Many providers offer discounted packages. 2  For example, Joint Ventures Physical Therapy and Fitness in Massachusetts charges $70 for a half-hour session and $105 for an hour-long session, but offers packages that take $10 off the cost of each session. Physical therapy typically is covered by health insurance when medically necessary. 2  For patients not covered by health insurance, physical therapy typically costs $50-$350 or more per session, depending on the length of the session, the service provided during the session and the provider.