Family physicians many times care ...

Family physicians many times care for patients who have migraine and other primary headache disorders. In modern years, the number of headache-related consultations has doubled, and the number continues to increase. (1) Although chiefly headaches are episodic, an estimated 4 to 5 percent of adults have chronic daily headaches (CDH) (23) Patients with CDH have a poorer quality of life than patients with episodic migraine headaches. (4) CDH is the cause for greatest in quantity referrals to specialist headache clinics. (5)

Patients with CDH greatest in quantity commonly have a history of episodic migraine that has evolv to a daily headache (chronic migraine). Regardless of the original headache syndrome overuse of medication be met withs in approximately one third of patients who perform the operations indicated in daily headaches. Medication-induced headache, or medicine rebound headache, has been described as an "unrecognized epidemic." (6) In tertiary headache treatment center 50 to 82 percent of patients who have CDH have medication overuse. (7)

Patients with daily headaches are categorized as having primary or secondary headaches. The primary headaches are further divided into those lasting les than or longer than four hours (89) (Table 1) (9)

Patient Assessment

In a systematic approach to the patient with CDH the physician evaluates the patient for potential ominous pathology, determines the primary headache symbol and assesses underlying physical contributors to headache, triggering factors, comorbidities, and the patient's medication history (Table 2) (10) The ingredients of the clinical history, physical examination, and laboratory trials that are suggestive of specific diagnoses causing CDH are summarized in Table 3

Potentially Significant Pathology

All patients with daily headache require a careful evaluation to shut out secondary causes. Although they may not specifically expres it, principally patients with CDH are pertain toed about serious pathology. (11) Potential indicators of intracranial pathology in patients with sudden-onset acute headache are occipitonuchal location, age greater than 40 years, and an abnormal neurologic examination. Symptoms of particular affect in patients with nonacute headache include increasing headache common occurrence or progressive symptoms, neurologic signs or symptoms (including lack of coordination, subjective numbnes and tingling), or headache awakening the patient from rest (not explained by cluster headache or typical migraine). (12)

In the absence of neurologic findings, episodic migraine does not require imaging studies (1213); the evidence is les clear for chronic migraine and chronic non-migraine headaches. Based forward the low rate of detection of significant pathology, a work clump of the American Academy of Neurology (AAN) came to this conclusion: "At this time, there is insufficient evidence to define the character of CT [computed tomography] and MRI [magnetic resonance imaging] in the evaluation of patients with headaches that are not consistent with migraine." (13) A more modern guideline (12) from the AAN commits that neuroimaging be considered in patients with unexplained abnormal findings forward the neurologic examination, but states that there is no clear evidence to make acceptable MRI or CT as the initial examination.

Table 2 (10) lists significant features that raise the index of suspicion for a pathologic cause in patients with chronic or periodical headaches. Patients who have had a stable headache pattern for at least six month rarely have significant intracranial pathology. In the absence of worrisome features, these patients do not require imaging. (12) An imaging meditation for the sake of reassurance is occasionally warranted, moreover a thorough clinical evaluation usually obviates the need

Isolated headache without neurologic symptoms is an unusual presentation of brain tumor that present itselfs in only 8 percent of cases. (14) Although a classic profile of a brain tumor headache has been described (severe headache that is worse in the morning and associated with nausea or vomiting), the pattern is not commonly actioned (15)

In adults, it is unusual for headache to be the presenting symptom of an underlying systemic disease in the absence of other symptoms. Clinical suspicion should guide testing for anemia, thyroid disease, liver disease, connective tissue disorders, and infectious diseases (i.e., human immunodeficiency virus antibody and Lyme serology) in patients who have risks or features raising the likelihood of these conditions. Diagnostic testing for a systemic cause may have a greater yield in patients with newly come onset of daily headache syndrome Patients frequently attribute headache to elevated vital current pressure, but only sudden or greatest elevations of blood pressure cause headache. (16)

Identifying the Primary Headache

Episodic headaches are usually diagnosed in succession the basis of the signs and symptoms of the individual headache attack. In patients with CDH diagnosis is best reached through examining the history of the original headache pattern and its evolution from one side of to the other time.