What's with the sudden cramps in the back of the head?

A, the back of the head suddenly cramp-like pain is a manifestation of neuralgia, most commonly seen in occipital neuralgia. Generally due to the decline in human resistance, caused by viral infection, in excessive fatigue, stay up late, alcohol, mood swings easily induced. If the skin in the pain site shows herpes, it is caused by herpes zoster virus infection occipital neuralgia. Second, the back of the head suddenly cramp-like pain can also be seen in myotonic headache, mainly caused by excessive muscle tension and stiffness in the head and neck. Third, the back of the head cramp-like pain can also be seen in migraine, manifested as repeated attacks of throbbing pain in the back of the head. Fourth, for the back of the head suddenly cramp pain, it is recommended to do brain CT or MRI examination to rule out secondary headache caused by brain lesions.