Tension headaches are the most common type of headache. They happen when the muscles in the neck, shoulders, or jaw are tense, which causes pain that radiates to the head.
Tension headaches tend to come on slowly and get progressively worse over several hours. A person may notice this type of headache after spending several hours in the car, at the computer, or in an uncomfortable position.
A person with a tension headache may notice that the muscles in their neck or shoulders feel tense. They may also find that massaging these muscles either eases the headache or makes it worse.
Tension headaches are not dangerous, but they can last for hours or days. Stretching the head, neck, and shoulders or taking frequent screen breaks and practicing deep breathing may help.
Source Article from https://www.medicalnewstoday.com/articles/327347.php