Distance Direction; USA - California - San Francisco: Tue 4:09 am---USA - California - Daly City: Tue 4:09 am: 9 km: 6 miles: 5 nm: SSW: USA - California - Oakland: Tue 4:09 am: 13 km: 8 miles: 7 nm: ENE: USA - California - Berkeley: Tue 4:09 am: 16 km: 10 miles: 9 nm: NE: USA - California - San Rafael: Tue 4:09 am: 24 km: 15 miles: 13 nm: NNW: USA - California - Hayward: Tue 4:09 am: 32 km: 20 miles: 17 nm: ESE
Headaches in the back of the head may be caused by a variety of ailments and injuries. Chronic headaches in the back of the head -- also known as occipital headaches -- are often variants of tension-type headaches or migraines. New-onset occipital headaches are a more urgent concern. Possible causes include blood vessel abnormalities, nerve disorders and serious traumatic injuries.
Between the clusters of headaches are pain-free times that can last months or even years. Cluster headaches affect men more frequently than women. Pain from cluster headache is typically on one side of the head and in the worst attacks the pain can be excruciating. Pain may also be bilateral and non-throbbing. There are two types of cluster headaches, episodic and chronic. This type of cluster headaches have clearly defined groups of headache attacks.