Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing<unk> , is a rare headache disorder that belongs to the group of headaches called trigeminal autonomic cephalalgia (TACs). Symptoms include excruciating burning, stabbing, or electrical headaches mainly near the eye and typically these sensations are only on one side of the body. The headache attacks are typically accompanied by cranial autonomic signs that are unique to<unk> . Each attack can last from five seconds to six minutes and may occur up to 200 times daily. TACs are caused by activation of the autonomic nervous system of the trigeminal nerve in the face. As of 2015 about 50 cases have been described in the medical literature. Onset of the symptoms usually come later in life, at an average age of about 50. Although the majority of patients are men over the age of 50, it is not uncommon to find<unk>  present among other age groups, including children and infants.
SUNCT syndrome
MASA syndrome
SAHA syndrome
Hopkins syndrome
TAN syndrome
EAST syndrome
Crome syndrome
Bogart–Bacall syndrome