Final answer:
The subject of the question is Medicine, and the grade level is College. The symptoms described suggest a cluster headache.
Step-by-step explanation:
The subject of this question is Medicine. The symptoms described suggest a condition known as cluster headache. Cluster headaches are severe headaches that occur in cyclical patterns or clusters. They are typically accompanied by other symptoms such as unilateral lacrimation (tearing), rhinorrhea (runny nose), and ptosis (drooping eyelid).