Phlegmatic / phlegm

In the Four Temperaments system, a person who had too much phlegm in them was known as "phlegmatic". Phlegm is the yellowish gunk you find in your nose or throat. Someone who was phlegmatic would be someone who was stationary, cautious, unwilling to change, and sometimes just lazy.

Treatment for phlegmatics would be to clear all the phlegm out of their system (vapor baths etc) and to start encouraging them to try out small changes and activity.