Cluster Headaches commonly occur at night, manifesting behind one eye or on one side of the head. Symptoms can last up to several weeks and may be recurring. Pain is often described as severe. 

Migraines are headaches which are typically recurring. The pain occurs on one side of the head and is frequently accompanied by nausea and disturbed vision. 

Occipital Neuralgia (also known as C2 Neuralgia) is a condition in which chronic pain finds place behind the eyes, back of the head and the upper neck. This occurs when the occipital nerves become inflamed or have experienced trauma.

 Post-trauma Headaches. These headaches develop within seven days after a brain injury has been sustained. These headaches are described as ranging from mild to severe, from ongoing to pulsating. May or may not be accompanied by nausea, dizziness and sensitivity to light, among others.

Rebound Headaches (also known as medication-overuse headaches or refractory headaches) occur when long-term use of short-acting pain medication has occurred to treat headaches or migraines. 

Tension Headaches, or stress headaches, are caused by tightened muscles in the back of the neck and may be chronic or episodic and are triggered by stress. This pain, sometimes described as feeling like ‘a band around the head,’ may last anywhere from thirty minutes to several days.