Infection: An infection of the fluid surrounding the brain (meningitis) or of the brain itself (encephalitis) can cause severe headache symptoms.Structural causes: A structural abnormality in the brain, such as a tumor or a malformation that has been present since birth, can cause increased pressure.Increased pressure within the skull due to a process within or surrounding the brain will commonly lead to a severe headache along with other symptoms, such as vomiting or confusion. This is a common complication following a lumbar puncture or after epidural anesthesia used during certain operations or childbirth with vaginal deliveries. Loss of some of the fluid that surrounds the brain and spinal cord can decrease pressure in the skull and lead to headaches. Extremely high blood pressure can also cause a headache. For example, an eye condition called glaucoma can trigger an acute and severe headache. Many medical conditions can cause headaches that may be severe. The headaches may increase in frequency until they occur every day. Unfortunately, overuse of pain medications to treat your headaches can actually make them worse over time. In some cases, severe headaches have characteristic features that allow for the diagnosis of a specific chronic headache syndrome. Severe headache causes Headache syndromes Worsening headache when standing up or when lying down.Neurological abnormalities such as confusion.If you're experiencing a severe headache, you may also experience: Common accompanying symptoms of a severe headache In this case headaches are thought to occur due to overexcitement of nerve endings in the brain. They can also happen without an underlying medical problem. Severe headaches can occur due to an identifiable cause such as an injury. Depending on the cause, the headache can be located in different parts of the head, can last for a short or long amount of time, and may be throbbing, non-throbbing, intermittent, continuous, dull or sharp in quality. In other cases, a new type of severe headache can arise suddenly. However, some conditions cause recurring headaches so severe that it is impossible to continue normal daily activities. Most people get mild headaches from time to time.
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