To characterize factors related to bullying in tenth grade students with low performance, taken as reference 5 from schools district No. 5 in Santa Marta. A cross-sectional study is conducted; 582 students and 186 students sampled, to whom a MESSY (Matson Evaluation of Social Skills in Youngsters de Matson Rotatori y Helsel 1983). Scale was applied, previous validity in school population for this research. Data was processed using SPSS 17.0v a highest percentages of 6 factors measured by Adequate Social Skills Scale in average level (59 %), inadequate assertiveness (77 %), impulsivity (75 %), overconfidence (49 %), jealousy/loneliness and others (83 %): As a conclusion, there is no bullying in this population, but two risk factors were found: impulsivity (19 %) and loneliness (16 %); and protective factor (adequate social skills 31 %). It is suggested to apply prevention programs focused on the last three factors.