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.
This is unfortunate for people who have looked past the stigma of therapy and committed to living happier lives but canât afford the therapistâs rates. The average therapy session costs $75-150 an hour, and good luck if you live in a place like New York where the range jumps to $200-300.