Many things can trigger headaches. Some common headache causes include: muscle tension, caffeine withdrawal, sinusitis (congestion),  lack of sleep, constipation, spinal misalignment, food and seasonal allergies, as well as many other factors.

Most commonly, neck muscles that are tense, will cause headaches after you are under stress, sitting for long periods of time, bad posture, or in a high-impact incident that would jolt the neck (i.e. car accident).

Know of any other headache causes? Please post them in the comments section!

Yes, sinus headaches are caused by the inflammation of the sinus cavities in the face. Sinus headaches are focused, dull pain, around the nose  and often worsen with certain movements of leaning forward and bending the head.

Regular headaches may be caused from a number of factors and occur often in the upper head, temples, and sometimes are focused on one side. Other types of headaches are often treated with an over-the-counter pain reliever whereas sinus inflammation is often an infection and prescribed an antibiotic.

Natural cures for sinus headaches include eating jalepenos (spicy foods will help drain the sinuses), and herbs such as eucalyptus and peppermint may relieve pain and prevent sinus problems in the future. Sinus headaches should be reviewed by a physician if symptoms worsen due to risk of further health problems if left untreated.