![Man with arms crossed](/_nuxt/img/transparency.6ce42a6.png)
Cluster headache
is considered one of the most severe forms of headache
It is thought to affect more than 250,000 adults in the US.
There are 2 types of cluster headache:
Episodic
- A period of cluster headache attacks that lasts 7 days to 1 year, separated by a cluster headache-free period of at least 3 months
Chronic
- A period of cluster headache attacks that lasts for at least 1 year with cluster headache-free periods lasting less than 3 months
Emgality is not approved for the treatment of chronic cluster headache attacks.
![Image of stopwatch](/assets/images/dtc/clock_graphic_1.png)
The length and number of attacks can vary
During a cluster headache cycle, attack frequency can range from once every other day to 8 times a day, and attacks can last anywhere from 15 minutes to up to 3 hours.
Symptoms of cluster headache attack
Along with severe pain felt on one side of the head around the eye and/or temple, people may experience symptoms such as:
![Image of red eye with tear drops](/assets/images/dtc/redness-icon.png)
Redness and/or watering of the eye
![Image of head with stars above it](/assets/images/dtc/restlessness-icon.png)
Restlessness or agitation
![Image of nose with drops](/assets/images/dtc/runny-nose-icon.png)
Runny nose or nasal congestion
![Image of head with drops on forehead](/assets/images/dtc/sweating-icon.png)
Forehead and facial sweating
Ask your doctor to see if Emgality 300 mg can help reduce the number of your episodic cluster headache attacks.