Cluster tic syndrome (CTS) is a disorder characterized by three types
of pain attacks. One resembles trigeminal neuralgia, the second resemb
les cluster headache, and the third is mixed, starting as a neuralgic
pain immediately followed by a homolateral headache accompanied by aut
onomic signs. This type of attack is pathognomonic for CTS. The three
pain types can all be provoked. CTS appears between ages 20 and 70 and
may be either episodic or chronic; medical treatment is poor.