What’s with the constant headaches?

The common causes of headache are primary headache, such as migraine, tension headache, cluster headache; secondary headache, such as systemic diseases such as cold, hypertension; intracranial tumor and other intracranial lesions; trigeminal neuralgia and other neuropathy.
1. Primary headache, no specific cause of headache, headache history is long, intermittent, pain is mild, can be self-cured, mostly due to mental tension or stress, common migraine, tension headache, cluster headache, and so on.
2. Secondary headache, secondary to systemic diseases, such as colds, can cause fever, headache; hypertension can cause vascular throbbing headache; also seen in the intracranial and extracranial organic diseases, such as intracranial tumors, can appear deep persistent non-throbbing headache, sometimes accompanied by nausea, vomiting; as well as neuralgia, common trigeminal neuralgia, etc., which can be radiated to the head, resulting in headache.
There are many reasons for the headache all the time, should be examined under the guidance of the doctor to clarify the cause of the disease, and targeted treatment.