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.
Some therapists may charge as much as $200 or more per session, but most will charge $75-$150 a session. Many therapists work with a sliding scale fee schedule, which means their fee will depend on your income level.isa M. Vallejos, MA, LPC, NCC: Therapy costs have an extremely wide range. I know clinics that charge as little at $5 per session and others who charge $300 per session.