The type of headache you are describing is most likely a tension headache. This is one of the most common types of headaches. They are often described as a tight squeezing feeling that starts in the neck and moves over the crown towards both sides of the head. Although light sensitivity is more of a feature of migraine
headaches, it can be seen in tension headaches as well. Finally, tension headaches have been known to last for days if left untreated. On the other hand, migraine headaches are usually described as one sided (for example behind one eye) and throbbing in nature. They usually don't affect the neck. They often are triggered by sleep disturbances and dehydration. Thus it is possible that this is what you are suffering from. Your doctor
will be able to distinguish between the two which is important because the treatments are different.
I suggest that you schedule an appointment with your primary care physician
. He or she can listen to the description of your headaches and perform a simple neurological exam. Your doctor may recommend some neck stretching or exercises that may help relieve the tension. In addition, you doctor may give you a prescription for some anti-inflammatory drugs or acetaminophen.