This is received from Doctor ordered physical therapy. Physical therapy folks treat athletic injuries and work place injuries. I have heard some doctors will just issue some Advil tablets and call it a day. This by itself is ineffective except for the lightest form of tendonitis. The usages of bandages are doubtful, because they can restrict blood flow, and make the symptom worse.
Splints are somewhat controversial.
Tight fitting splints suffer the same disadvantages as bandages. A somewhat loose fitting splints may be useful in office, where it is a good visual excuse for not typing so much. However, personally I feel I did not get too much out of splints. One basic measure is to reduce the amount work using the hand. They can include typing, mousing, holding books, digging in the garden, washing dishes, video games, carrying babies, and playing tennis.