Presentation and course
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• Most patients with primary stabbing headache experience brief attacks (< 3 seconds). |
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• Patients with primary stabbing headache do not have accompanying autonomic symptoms. |
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• The presentation of primary stabbing headache in children and adolescents varies widely and sometimes includes a family history. |
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• Patients, especially children, may report stab durations longer than a few seconds, suggesting that the duration criterion may be less reliable in children and should be interpreted cautiously. |
Primary stabbing headache is characterized by brief, sharp, and severe jabbing pain in the head that occurs either as a single episode or as a brief repeated volley. The International Classification of Headache Disorders (ICHD) has formulated criteria for this diagnosis (Table 1) under the term 4.7 “primary stabbing headache” (14). The pain resembles a stab from an ice pick, nail, or needle, and it typically lasts from a fraction of a second to 1 or 2 seconds. Primary stabbing headache may have the shortest duration of all known headaches. The frequency of attacks varies significantly, ranging from one attack per year to 50 attacks per day. The pain was originally believed to be isolated from the distribution of the trigeminal nerve; however, studies have shown that 53% to 80% of patients with primary stabbing headache experienced stabs throughout the extratrigeminal location (19), and the diagnostic criteria of ICHD-3 have removed this location requirement for diagnosis. Icepick-like pain is more common in women and has been reported in children (01).
Table 1. ICHD-3 Diagnostic Criteria for Primary Stabbing Headache
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(A) Head pain occurring spontaneously as a single stab or a series of stabs and fulfilling criteria B and C (B) Each stab lasts for up to a few seconds (C) Stabs recur with irregular frequency, ranging from one to many per day (D) No cranial autonomic symptoms (E) Not better accounted for by another ICHD-3 diagnosis |
Most stabs last 3 seconds or less and rarely last for 10 to 120 seconds (11). These pains are typically unilateral but may be bilateral. They occur primarily in the parietal region (44.4%), followed by the frontal (21.5%) and occipital (13.9%) regions (29). The attacks also typically recur in the same area. If they occur in patients with other types of headaches, they are characteristically located on the same side and frequently at the same site as customary headaches.
The attack frequency is generally low, with only one or a few attacks daily. The temporal patterns of attacks vary widely. Most patients experience only a single jab, although some may experience volleys of jabs. Attacks can occur up to 50 times daily.
Between 38% and 74% of patients experience jolts, which are sudden movements that occur along with stabs (11; 17). Vocalization has also been reported in 18% of patients (11). Clinical studies have reported allodynia in 19% to 37% of patients (11; 21; 17). Accompanying phenomena, such as tearing, eye redness, and nausea, are absent.
Some patients, particularly those with comorbid migraines, have reported precipitating triggers of idiopathic stabbing headaches. Triggers include rapid alterations in posture, physical exertion, bright light, and head motion during migraine attacks (26). However, in most patients, pain is unprovoked. Of note, the co-occurrence of primary stabbing headache and migraine is high; one tertiary center study found concomitant migraine in 90% of primary stabbing headache patients, along with hemicrania continua in 7% and cluster headache in 10% (05).
Ammache and colleagues described a 27-year-old man with primary stabbing headache associated with monocular visual loss and a scintillating scotoma ipsilateral to the pain (02). The patient had a history of migraine with aura.
Ahmed and colleagues reported on 42 children and adolescents with primary stabbing headache (01). The mean patient age was 12 years. Most stabs were located in extratrigeminal regions. The stabbing frequency ranged from daily to monthly. The presentation and nature of primary stabbing headache in children and adolescents vary widely. Two patients in this cohort had a family history of primary stabbing headache.
In another cohort of 77 children and adolescents with primary stabbing headaches, 16.9% were younger than 6 years of age at presentation (38). The headache location was frontal in 54.5% of patients and bilateral in 68.8%. One study showed that the features of childhood primary stabbing headache can vary widely (24). Most of the stabs lasted between a few seconds and 30 minutes, and more than half did not meet the ICHD-3 criteria for primary stabbing headache owing to their duration. This study also found that a high proportion of patients (33%) had associated primary headache, particularly migraines. Also, 72% of patients had at least one episode of episodic syndrome (infantile colic, benign paroxysmal vertigo, motion sickness, recurrent abdominal pain, and cyclic vomiting) (24).
Pediatric primary stabbing headache has several distinct features. Attack duration in children varies considerably, ranging from a fraction of a second to several minutes. Although the ICHD-3 criteria specify stabs lasting up to a few seconds, pediatric cases often present with longer durations. This variability is particularly challenging when interviewing pediatric patients because young children have difficulty distinguishing a single stab from a series of stabs (35).
The quality of pain in pediatric cases may vary, with stabbing pain being the most common, with up to 34% of pediatric patients reporting nonthrobbing pain. This may reflect the difficulty that younger patients have in precisely describing their pain experiences. The intensity typically ranges from moderate to severe, although some pediatric patients describe mild-to-moderate pain that does not affect daily activities. Pain is often unilateral and most commonly localized in the frontal region; occipital pain has also been reported. Associated symptoms, although infrequent, include nausea (in 7% to 14.3% of patients), photophobia and/or phonophobia (in 2.6% to 19% of patients), vertigo (in 1.3% to 8% of patients), and vomiting (in 1.3% to 5% of patients). Some studies have reported a high frequency of periodic syndromes (in up to 47% of patients), primarily cyclic vomiting and recurrent abdominal pain preceding the onset of primary stabbing headache (01; 38; 35).
Several key differences distinguish pediatric primary stabbing headaches from adult cases (35):
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1. Attack duration: Although adult primary stabbing headache typically presents with very brief attacks (3 seconds or less), pediatric cases often report longer durations, up to 15 minutes in some cases. This difference may necessitate reconsideration of the current ICHD-3 diagnostic criteria for pediatric populations. |
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2. Pain quality: Adults consistently describe stabbing pain, whereas children may report variable pain qualities, including throbbing, reflecting potential developmental differences in pain description capabilities. |
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3. Location: Adult patients frequently report occipital pain, whereas pediatric patients commonly present with frontal region involvement. |
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4. Associated features: Adults more commonly report jolts, grimacing, and allodynia, whereas these features are rarely reported in children. However, accompanying symptoms such as nausea, vomiting, and photophobia show similar frequencies across age groups. |
Prognosis and complications
Primary stabbing headache is a benign condition that may recur over time. A clinic-based study of 106 patients found that 36.3% experienced recurrence within 2 years of the initial episode (07). Patients with recurrent primary stabbing headache were more likely to have a prior history of stabbing headache (55.2% vs. 29.4%), comorbid migraine (17.2% vs. 3.9%), and severe pain intensity (41.4% vs. 17.7%). Multivariable Cox regression analysis revealed that comorbid migraine was an independent predictor of recurrence (adjusted hazard ratio, 2.791; 95% confidence interval, 1.012-7.701), suggesting shared pathophysiological mechanisms between migraine and primary stabbing headache that may influence prognosis (07). In patients with infrequent attacks, education on the disorder may be sufficient, and medication may not be necessary. In patients receiving prophylactic treatment, periodic attempts to taper medication are reasonable options for the evaluation of possible remission.
Primary stabbing headache is difficult to predict because of its significant temporal variability. Kim and colleagues addressed this by prospectively screening and following patients diagnosed with primary stabbing headache in their clinic between June 2015 and March 2016 (17). They identified 65 patients and determined that most followed one of three possible daily patterns: monophasic (n=31), intermittent (n=17), or chronic (n=12). Patients with a monophasic disease course tended to experience a duration of approximately 9 days, with attacks of greater severity, occurring singly but with multiple attacks daily, side-locked attacks, and responding well to treatment. Women were more likely to experience an intermittent pattern and would experience symptoms for an average of 2 years, with sporadic stabbing headaches and variable intensity. Chronic daily primary stabbing headache tended to last for 9 months, was more likely to occur in women, and presented with attacks that were longer-lasting and could change locations. This study was the first to prospectively examine the clinical course of primary stabbing headache, and with the identification of three different typical patterns, future research should help clarify the etiology and optimize treatment strategies.
The natural history of pediatric primary stabbing headaches differs from that of adult cases. Although adults typically show monophasic, intermittent, or chronic daily patterns, pediatric patients often demonstrate more variable courses. The available follow-up data suggest generally favorable outcomes in children, with most patients showing clinical improvements over time. One prospective study showed that a chronic-intermittent course was predominant in pediatric cases (38 of 42 patients) (01). However, long-term natural history data specific to pediatric-onset primary stabbing headache remain limited, and further longitudinal studies are needed (35).
Clinical vignette
Patient 1. A 64-year-old man presented with a 5-year history of headaches. Pain was typically located in the left temporal region. It lasted less than 1 second and was described as a sharp and stabbing pain. Other areas were also affected by the stabs, including the left and right parietal and right occipital regions. He had six to 12 stabs daily. No accompanying symptoms were associated with pain. The physical and neurologic examination results were normal. MRI and MRA of the brain were normal. The patient was prescribed indomethacin 25 mg, three times a day, with a significant improvement in headache frequency; however, the medication was not well tolerated. Specific cyclooxygenase-2 inhibitors were administered with good relief.
Patient 2. A 58-year-old woman complained of sudden pain in the right frontoparietal region for 3 weeks. The sudden stabs of pain, lasting approximately 1 minute, were very severe, frustrated the patient, and were followed by vocalization. She reported two to three episodes per day, without autonomic symptoms or other accompanying features, but the attacks increased progressively. Indomethacin 25 mg three times per day was initiated, but she still experienced frequent attacks. Celecoxib 100 mg twice daily was prescribed; however, it was ineffective. MRA of the brain showed an aneurysm in the right posterior communicating artery.