Causes of Headaches

Causes of Subacute Headaches

Many different things also can cause subacute headaches, which occur over a period of weeks to months. These headaches may signify something serious, especially if the pain worsens over the months or if it occurs in the elderly.
 
Some possible causes include:
 
  • Temporal arteritis (also known as giant cell arteritis)
  • A brain tumor
  • A brain abscess, which is a pocket of pus inside the brain
  • Bleeding inside of the brain, such as with a subdural hematoma
  • Trigeminal neuralgia
  • Glossopharyngeal neuralgia
  • Postherpetic neuralgia
  • High blood pressure (hypertension)
  • Pseudotumor cerebri, a condition in which pressure builds up inside of the brain because of an increase in fluid
  • Certain medical conditions, such as inflammatory bowel disease (Crohn's disease or ulcerative colitis), systemic lupus erythematosus, or HIV/AIDS.
     

What Causes Chronic Headaches?

Chronic headaches are often experienced for years. While each attack may be quite disabling, these types of headaches are not usually caused by a serious condition. The most common cause of chronic headaches is tension headaches (also known as tension-type headaches or stress headaches). Some other causes include:
 
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