BACKGROUND: Primary Stabbing Headache (PSH) is characterized by brief, focal, and paroxysmal pain (\"stab\"), occurring sporadically or in clusters. Data on pediatric cases are poor.
METHODS: We performed a comprehensive literature review by searching PubMed, Cochrane, and Embase in order to collect pediatric case reports and case series of PSH.
RESULTS: A total of 12 out of 162 articles assessed for eligibility were finally included. The prevalence of PSH and probable PSH varies from 2.5 to 10% among children with primary headaches and it is higher among children aged less than 6 years old. The mean age of onset is between 7 and 11 years of age. Attack duration greatly varies, ranging from a few seconds to several minutes. The intensity of pain is usually from moderate to severe. Associated symptoms are infrequent but may be observed (mainly photophobia, vertigo, nausea, and vomiting). Neuroradiological findings are usually unremarkable; EEG may show sporadic epileptiform abnormalities (up to 30% of cases). Preventive therapy is anecdotal, including treatment with indomethacin, trazodone, valproate, and amitriptyline.
CONCLUSIONS: PSH is a common but still underdiagnosed entity among children with primary headaches; further and larger cohort studies are needed to better assess, in particular, prognosis and response to therapy.

Other primary headache disorders (OPHD) are under-investigated compared to frequent primary headache types like migraine, tension-type headache, and trigeminal autonomic cephalalgias. Knowledge of the distribution and characteristics of OPHD subtypes is crucial for their recognition. We aimed to determine the prevalence at the hospital and headache clinics and clinical characteristics of OPHDs in patients from 13 countries.
We analyzed a large dataset from the cross-sectional study Head-MENA-A (Middle East, North Africa, Asia). Consecutive patients over 10 years of age presenting with headaches were included from outpatient, inpatient, and emergency settings. A structured questionnaire addressing demographics, headache characteristics, accompanying symptoms, and triggers was administered. Headache subtypes were diagnosed according to the ICHD-3 criteria.
Among patients complaining of headaches (n = 3722), 106 (2.9%) were diagnosed with OPHD. Fifty-two patients (1.4% of all headache patients) had only OPHD, while 54 (1.5%) had both OPHD and a co-existing primary headache (mostly migraine). All OPHDs were more common in females. The most frequent subtypes were new daily persistent headache and primary stabbing headache (0.2% each among all admitted patients). Photophobia and phonophobia were the most frequent accompanying symptoms, while physical activity (28.8%), stress (15.4%), and the Valsalva maneuver (15.4%) were the most common triggering factors. The majority of triggering factors were more pronounced in patients with both migraine and OPHD.
Other primary headaches are rare and heterogeneous. Their high co-existence with migraine suggests shared predisposing factors, hinting at a \"headache continuum\" concept for primary headaches.

BACKGROUND: Primary stabbing headache (PSH) is an idiopathic headache disorder characterized by head pain occurring as a transient and localized single stab or a series of stabs. The present study aimed to examine the characteristics of childhood PSH and whether they fit the International Classification of Headache Disorders, 3rd edition (ICHD-3) criteria. We also investigated the association with migraine and episodic syndromes.
METHODS: In this retrospective study, we included 60 patients seen at two headache clinics (Rome and Bari) between 2016 and 2022. A headache-focused history was obtained. All patients had normal neurological examination. PSH was defined according to ICHD-3 criteria.
RESULTS: Twenty-three patients were male (38%) and median (range) age at disease onset was 8 (3-17) years. Stabs recurred with irregular frequency and their duration varied from a few seconds up to 30 minutes. Stabs were located in different head regions. Twenty-five patients (42%) underwent neuroimaging exams. Five children reported a limitation of daily activities and none had a chronic pattern. Forty-seven patients (78%) reported a family history of primary headache, especially migraine, and forty-three had episodic syndromes (i.e. infantile colic, benign paroxysmal vertigo, motion sickness, recurrent abdominal pain, cyclic vomiting). Twenty patients had an associated primary headache: 16 suffered from migraine and four suffered from tension type-headache. According to ICHD-3 criteria, thirty-one patients had a diagnosis of probable PSH as a result of a duration of stabs longer than a few seconds (>3 seconds).
CONCLUSIONS: Features of childhood PSH can vary widely. As seen in previous studies, several patients reported a stab duration longer than a few seconds and this might suggest that current ICHD-3 criteria may need adjustments to be suitable for children. High frequency of associated migraine and episodic syndromes could suggest a common pathophysiological mechanism between PSH and migraine. We can hypothesize that PSH and migraine attacks may be part of a spectrum of the same disease, although further evidence is needed. Larger studies with long-term follow-up are needed to improve understanding of this condition.

Primary stabbing headache is a common but under-recognized primary headache disorder. The objectives of this review were to provide practical information for better understanding and identification of the disease, suggest an algorithm for differential diagnosis, and provide an insight into the pathophysiology of primary stabbing headache hypothesized from its clinical course.
This narrative review of primary stabbing headache is based on a literature search and the authors\' clinical reasoning.
The phenotype of each stab is typically abrupt, ultrashort-lasting (<3 s), focal or multifocal, paroxysms of pain occurring sporadically or in clusters. The diagnosis of primary stabbing headache is clinical; fixed or migrating stabs without background pain or sensory abnormalities and the absence of features suggestive of other disorders (e.g., cranial autonomic symptoms or signs) can aid in the diagnosis of primary stabbing headache. The clinical patterns include monophasic, intermittent, and chronic primary stabbing headache, of which the first two are considered typical. The pathophysiology of primary stabbing headache has not yet been elucidated. In this review, we postulated the mechanism of stabbing headache, based on the pain phenotype and clinical course, and provide a clinical algorithm for the differential diagnosis of primary stabbing headache.
Knowledge about the typical manifestations and clinical patterns of primary stabbing headache will aid in the proper diagnosis and differential diagnosis. Treatment should be tailored by considering the clinical patterns. Further research is needed to elucidate the pathophysiological mechanisms and optimal treatment of primary stabbing headache.

OBJECTIVE: This retrospective case series study aimed to investigate the demographic and clinical patterns of primary stabbing headache (PSH). In addition, we tried to identify subgroups of treatment responses in a neurology outpatient consultation at a Portuguese tertiary hospital.
METHODS: Clinical records were retrospectively reviewed and patients meeting the International Classification of Headache Disorders, 3rd edition, criteria for PSH were identified from January 2014 to December 2020. We collected data regarding demographic characteristics, clinical features of the headache, primary headache comorbidities, and information about treatment-related do PSH.
RESULTS: Of 1857 patients, 32 (1.7%; mean [SD] age of onset 56 [3.5] years) had the final diagnosis of PSH. Regarding headache characteristics, 20 patients (62.5%) reported episodes of stabbing in fixed locations and 12 (37.5%) in multiple areas; the duration of each attack was between ≤5 s (seven [21.9%]), 5-60 s (20 [62.5%]), and ≥60 s (five [15.6%]). In all, 18 patients (56.3%) had an episodic course (vs. six of 32 [18.8%] an acute course and eight of 32 [25%] a chronic course). In all, 17 patients started medical treatment (53.1%), with total or partial improvement in 10 (58.8%) of them. It was found that patients with pain in fixed locations had a better response to treatment when compared to patients with multiple locations, in a statistically significant way (eight of 11 vs. two of six, p = 0.023).
CONCLUSIONS: In our sample, the mean age of onset of PSH was >50 years and there was a wide range of PSH duration. The duration of each attack (>5 s), the pain in fixed locations, non-daily episodes of the pain in each attack, and the intermittent course of headache were the most prevalent clinical features. Finally, patients with stabbing in localized areas had a better response to treatment.

Primary stabbing headache (PSH) is a transient and localized headache disorder. Facial variants of this rare pain syndrome have not been previously described. Four patients (n = 2 female, 2 male) presented themselves to our headache and facial pain outpatient clinic. They suffered daily from several dozen to several hundred short-lasting stabbing pain paroxysms primarily in the second and third trigeminal branches (V2 and V3) without lateral predominance. These non-neuralgic pain paroxysms did not strictly follow dermatomes, were not accompanied by trigeminal autonomic features and could not be triggered but occurred exclusively spontaneously. They did not fulfill any existing ICHD-3 criteria but appeared clinically to have similarities to primary stabbing headache syndromes. Indomethacin showed no efficacy. Exclusive facial variants of stabbing pain paroxysms should be classified as separate entities and tentatively be called stabbing facial pain.

To provide a comprehensive and updated review of the literature on primary stabbing headache.
Changes to the ICHD-3 criteria have resulted in increased sensitivity to capture primary stabbing headache (PSH). According to the ICHD-3, the sharp stabbing pain is no longer restricted to the first division of the trigeminal nerve. Age, gender, and co-morbidities such as migraine seem to influence the prevalence of PSH. Subclassification into monophasic, intermittent, and chronic forms have been proposed in a recent prospective study and may be helpful from a prognostication perspective; however, further studies are required. Secondary etiologies for stabbing headaches are part of the differential diagnosis of primary stabbing headache; therefore, it is reasonable to perform neuroimaging. For severe frequent attacks, indomethacin continues to be considered first line. Other treatment options include COX2 inhibitors and melatonin.

BACKGROUND: Primary stabbing headache (or \"ice pick headache\") is an alteration characterized by brief jabs (short stabs of pain, lasting ~3 seconds), which appear spontaneously, irregularly, and affecting unilaterally or bilaterally. Indomethacin has traditionally been used as the main therapeutic option. However, this drug is ineffective in a considerable percentage of patients and can generate multiple adverse effects that occur at therapeutic doses.
METHODS: A 7-year-old male patient with primary stabbing headache of mild to moderate intensity, lasting 3 to 4 seconds, without relevant history, with normal neurodevelopment, neurological examination and neuroimaging; no triggers were identified. It was started therapeutic trial with Coenzyme Q10; however, no improvement in the symptoms was identified.
RESULTS: A therapeutic management was carried out with Melatonin, which led to complete remission of the symptoms; without adverse effects in the posterior follow-up months.
UNASSIGNED: There is little information regarding effective and safe treatments for primary stabbing headache in children. The present case identifies Melatonin as an innovative, effective and safe therapeutic alternative in the treatment of primary stabbing headache in children. This is a significant advance in the understanding of primary stabbing headache in the pediatric population.
CONCLUSIONS: Melatonin may be an effective and safe therapeutic option for the treatment of primary stabbing headache in pediatric patients. It is necessary to deepen its research, in order to establish its use in a clinical practice guide.
UNASSIGNED: La cefalea punzante primaria, es una alteración que se caracteriza por punzadas breves (∼3 segundos), que aparecen espontáneamente, de forma irregular y afectación unilateral o bilateral. Tradicionalmente se ha utilizado Indometacina como opción terapéutica principal. Sin embargo, este medicamento es inefectivo en un porcentaje considerable de pacientes y puede generar múltiples efectos adversos que se presentan a dosis terapéuticas.
UNASSIGNED: Paciente masculino de 7 años de edad con cefalea punzante primaria de intensidad leve a moderada con una duración entre 3 y 4 segundos sin antecedentes relevantes, con neurodesarrollo, examen neurológico y de neuroimagen normales; no se identificaron desencadenantes. Se inició prueba terapéutica con Coenzima Q10, sin embargo no se identificó mejoría en los síntomas.
UNASSIGNED: Se realizó un manejo terapéutico con Melatonina que conllevó a remisión completa de la sintomatología y sin efectos adversos en los meses posteriores de seguimiento.
UNASSIGNED: Existe poca información respecto a tratamientos efectivos y seguros para cefalea punzante primaria en niños. El presente caso identifica la Melatonina como una alternativa terapéutica innovadora, efectiva y segura en el tratamiento de la cefalea punzante primaria en niños. Lo anterior constituye un avance significativo en la comprensión de la cefalea punzante primaria en la población pediátrica.
UNASSIGNED: La melatonina puede ser una opción terapéutica efectiva y segura para el tratamiento de la cefalea punzante primaria en pacientes pediátricos. Se requiere ahondar en su investigación para establecer su uso en una guía de práctica clínica.

A 32-year-old man with a 16-year history of recurrent primary stabbing headache was admitted to our hospital, owing to mumps meningitis. On day 2 of admission, he began experiencing episodes of unbearable intermittent stabbing pain, each lasting few seconds, with conjunctival injection and tearing, on the temporal side of the left orbit. We suspected trigeminal autonomic cephalgias, and administered non-steroidal anti-inflammatory drugs (NSAIDs), oxygen, and sumatriptan; however, the pain episodes persisted. Subsequently, after the start of intravenous lidocaine administration, the pain episodes stopped. We diagnosed a short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), triggered by mumps meningitis. This is a valuable case report, involving a patient with a history of primary stabbing headache who was diagnosed with SUNCT triggered by mumps meningitis.

We present a novel case of a focal stabbing headache sharing features of primary stabbing headache that started and resolved with the onset and resolution of a course of self-limiting peripheral vertigo. The association of onset and improvement of the stabbing headaches support the trigeminal and vestibular reciprocal relationships. Vestibular input may be the driving force and a potential target for treatment.