Final answer:
The Sympathetic nerve point on the ear is used in auricular acupuncture to treat symptoms like internal organ pain, palpitations, and various autonomic nervous system disorders.
Step-by-step explanation:
The point on the ear that treats pain in internal organs, palpitation, spontaneous sweating, night sweats, functional diseases of the autonomic nervous system, circulatory and digestive disorders is the Sympathetic nerve point. This point is part of auricular acupuncture, which is a microsystem of acupuncture, itself a component of Traditional Chinese Medicine that involves stimulating specific points on the ear. The sympathetic point is used to influence the sympathetic nervous system, which can help regulate internal organ functions and address the listed symptoms.