|Your co-worker may know all about acupressure, but he knows nothing about the huge liability associated with touching other people against their will. He may call it acupressure, but others may just as easily call it intimidation, bullying, sexual harassment, or even assault and battery.|
And further, there are some employees who have borderline physical ailments that should only be attended to by trained medical personnel. What would happen if your finger-happy co-worker goes to work on an employee's back and something goes "pop?" What if that person is suddenly unable to move?
You should immediately discuss this situation with your manager. Most managers today will quickly understand the exposure that is associated with what your co-worker is doing. A failure by management to take action in this kind of situation would only increase their potential exposure.
You were absolutely right to tell this acupressure player to keep his hands off you, and management should clearly reinforce this message. At the very least, management needs to direct this individual to start handling his job responsibilities and stop handling his co-workers.