Objective: To determine the knowledge of the "choking game" on a group of teenagers in the city of Cali.
Material and methods: A survey was conducted face to 350 students from two public schools and two private schools for training the 9th, 10th and 11th grade high school aged 12-17 years. Descriptive statistical analysis was conducted
Results: Most of the respondents were women. Knew about this game 260 and 190 of them had practiced. Curiosity is the most common cause for which began this practice yet occupies an important place on bullying. The technique used is the hanging caused by two people. Although it is considered the most dangerous technique almost 89% have performed more than once; 42% did not get the expected response. Headache and dizziness are the symptoms presented after the procedure. The 87% practical outside the home and 74% do not use any kind of stimulant for its realization. It is worrying that 68% of respondents recommend practicing this game.
Conclusion: The "choking game" is a dangerous, potentially deadly. His knowledge is important for prevention and early detection of risk behaviors among adolescents.

Objective: To study the epidemiological and clinical characteristics of migraine and tension-type headache in paediatrics, and to analyze the validity of criteria used to diagnose migraine.

Patients and methods: Information on epidemiological and clinical characteristics, physical examination and complementary examinations, when performed, were collected from medical records of 300 children with acute recurrent headache. The criteria defined by the International Headache Society (IHS) were used in the diagnostic. The sensitivity, specificity and likelihood ratio of the Vahlquist, Prensky and IHS criteria for migraine were all calculated.

Results: A total of 98.3% of the patients had primary headache: migraine (50%) and tensional-type headache (48.3%). Thirty two percent of those with migraine had migraine with aura. The mean age at onset was 8.7 years in migraine and 9.7 years in tensional-type headache (p <0.05), with no differences between sexes. Nevertheless, in migraine aura the age of onset (9.8 years) and prevalence of females (63.3%) were significantly higher (p <0.05). Children with tensional-type headache showed a higher prevalence (p <0.05) of female sex, urban origin and excellent academic performance. Children with migraine had a higher prevalence (p <0.05) of positive family history. In migraine, the pain was unilateral (44.4%) or bilateral (55.9%), pulsatile (87.5%), aggravated by physical activity (68.8%), caused lost days at school (65.3%) and were usually accompanied by vomiting (71%) and photophobia/phonophobia (67%). In the tension-type headaches were bilateral (81.8%) and oppressive (85.3%), they were less frequently aggravated by physical activity (22.3%) or inhibited activities (12.1%) and occasionally accompanied by vomiting (7.3%) and photophobia/phonophobia (18.9%). The pulsating quality, vomiting, one-sidedness and moderate to severe intensity were the items that displayed the greatest discriminating capacity and the IHS criteria were those with the highest diagnostic validity. Diagnosis was not altered by the complementary examinations.

Conclusions: Migraine and tension-type headache are a common cause of recurrent headache in paediatric age. Onset usually occurs in school-age children. The IHS criteria for the differential diagnosis of headache in children are useful, although monitoring its progress would be the gold standard to validate diagnostic criteria.

The importance, from the epidemiological perspective, of the assessment of childhood headache has not been recognized until very recently, despite the fact that it is the major neurological problem among our patient population. The reason for this is that headache accompanies disease processes that are very common and highly recurrent in children. It is estimated that approximately 5% of children have had a headache at some time in their lives. As in adults, most headaches in children are primary. A thorough history and physical and neurological examinations are the key to a correct diagnosis. However, in up to 30% of the cases, it is not possible to establish the cause of the pain. At the present time, most authors accept the criteria of the International Headache Society in terms of specificity. In some cases, especially in the presence of alarming signs and signals, it will be necessary to complete the examination with additional studies in order to rule out the presence of secondary headache.