Answer: Cluster headache
Step-by-step explanation:
Cluster headache is the type of headache that takes place at certain duration in months or particular days in a week. This type of headache persist seasonal nature for occurrence such as winters etc for short period of time in intense manner. It occurs on either side of head or eyes , tearing eyes, red eyes etc.
According to the situation mentioned in question, client might be having cluster headache as he has red and tearful eyes and headache is near behind the eyes.Headache is also in the severe form which occurs usually during the particular time.