Headache is defined as pain in the head.
Causes of the headache
Common causes which can lead to headache can be a tension headache, migraine headache.
This type of headache is due to workload or your day to day work avoid taking too much stress of work.
Also, Severe headaches can occur because of the weakening of eyes(eyesight weakening).
Check your medications maybe if you take some regular medicine it is showing side effects.
Other than this causes of daily severe headache can be depression, sleep disturbance, smoking, alcohol also if you sleep less or sleep more that can also cause a headache.
For example, if you are working and stressing too much then you can also feel a headache.