I have severe headache

How to treat headache?
3-There are some medications used in the treatment of headaches, including pain relievers such as Panadol or ibuprofen 2 tablets per dayas. It is also advised to get a complete rest and take enough sleep daily, in addition to drink sufficient amounts of water by a rate of 2-3 liters per day, and avoid psychological stresses, and follow a healthy diet regimen
What tests can be done?
You should undergo a clinical medical examination by doctor to assess your condition includig measuring blood pressure, and do some medical tests such as a complete blood count CBC to detect the presence of anemia, and measure the level of blood sugar to exclude high or low blood sugar. Eye examination to exclude the presence of problems. an electrocardiogram can be done, and brain CT scan can also be done to rule out any causes such as tumors 
What are the causes of headache?
There are many pathogens that cause headaches, including
Migraines
Cluster headache
Tension headache
Anemia or anemia
Hypertension
Problems with looking
Ear and sinus infections
Throat infections and influenza
The presence of tumors in the brain
Advice ?
Follow previous treatment advice and advice and follow up with your doctor