This is a very safe treatment for “Moyamoya blood vessel” which is thought to be a reason for refractory joint pain such as a stiff shoulder, painful shoulder, elbow・knee・back pain, or joint pain related to sports etc. Chemical agent is injected through a soft catheter of 0.6mm diameter. Treatment time is about 20 minutes to 1 hour for one region. This is one day treatment, so you can go back home with one hour rest after the treatment.