Problematic use of social media by adolescents, including TikTok, generates several negative consequences in the short and in the long term. This article reports the case of an adolescent who makes excessive and problematic use of social media, especially TikTok, and the development of aggressive behavior, mutism silence, and tics-like movements. During adolescence, social media is important for the development of cognitive and socio-emotional skills. However, problematic use has negative repercussions in several areas, including a higher incidence of depression, anxiety, impulsivity, psychological or sexual abuse, and recently, an increase in tics and Tourette syndrome associated with excessive use of TikTok has been described. In regards to that, it is important to raise awareness among the population on such subject, especially those who deal with adolescents, so that they can adopt strategies to limit use in order to enjoy the benefits of this technology and to minimize negative impacts on physical and mental health.