Patients with cerebral blood supply deficiency can massage their heads, but not their necks at will. If the cause of cerebral blood supply deficiency is precisely the formation of plaque in the cerebral artery in the neck, which blocks the blood vessel channel and causes blood flow obstruction, it may cause the plaque in the blood vessel to fall off and lead to the danger of cerebral thrombosis. But the head is protected by the skull, and there are no other dangers if there are no large arteries at the skull, so patients with cerebral insufficiency can massage their heads for whatever reason, but only do not easily massage the neck violently.