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 Kathe Wallace Physical Therapy in Washington charges $165-$205 for a one-hour initial evaluation, $112 for appointments less than 45 minutes and $150 for a session of 50 to 55 minutes. 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.