The arm massage should end at:

The arm massage should end at the elbow because this is where the massage technique typically ceases to provide effective relaxation and stimulation to the upper extremity. The elbow serves as a natural endpoint for arm massages, allowing the therapist to focus on the upper arm's muscles and joints while not straying into areas that may be too sensitive or would require a different form of manipulation altogether.

Ending the massage at the elbow ensures that the technique remains beneficial and avoids overstimulation of the lower arm or wrist area, which are more involved with hand and finger manipulation. The upper arm and elbow area can benefit significantly from the massage, relieving tension built up in the muscles and promoting increased circulation before moving on to the more detailed work that may involve the hand or fingers. Thus, this endpoint aligns with conventional massage practices and maintains client comfort while effectively addressing tension in the upper arm.