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.
About Cluster Headaches. Cluster headache-the most severe form of primary headache-involves sudden, extremely painful headaches that occur in clusters, usually at the same time of the day and night for several weeks.They strike one side of the head, often behind or around one eye, and may be preceded by a migraine-like aura and nausea.luster headaches are characterized by excruciating, piercing pain on one side of the head and eye; they occur more frequently in men than women. PubMed Health Glossary.