A bursitis treatment device (100; 200) for treatment of inflammation of a bursa (150; 502) in a patients joint, comprises: - a rinsing aid; - a reservoir (101; 201) for holding the rinsing aid in fluid, freezing fluid or gaseous state; - a supply line (103; 204, 208) for transporting the rinsing aid; - a heat exchanger (104; 203) for controlling the temperature of the rinsing aid; - an access device (209) for injecting the rinsing aid into the bursa (150; 205); and - a drain (105; 210) for removing the rinsing aid from the bursa (150; 205).