Sinus headache results from sinusitis, which is swelling and irritation of the sinuses. Often an infection is responsible. Sometimes people with migraine or tension-type headache think they have sinus headache. As the treatment for sinus headache is quite different, it's important to differentiate between these headache types. You may need to visit your doctor to get a definite diagnosis of your headache type.
Secondary headache is caused by an underlying medical condition.
Sometimes this condition is serious, and so it's important to see a doctor right away if you suspect you may have this type of headache. This is especially true if you're over 50 and are having new headaches. Rebound headache occurs when someone overuses headache medication. She may find that the medication doesn't seem to work as well as it once did, or that she needs to take larger doses for relief. A doctor can help discontinue the medication and find an alternative treatment.