Mild concussions generally do not have any lasting effects. After a mild concussion, as long as one rests well, maintains a good mindset, and uses medication when necessary, along with symptomatic supportive treatment, the vast majority of people can fully recover within one to two weeks without any lasting effects. Only a few people, due to psychological and mental factors, may continue to experience symptoms that are difficult to improve for more than three months. In these cases, we consider these to be the after-effects of mild concussion, which mainly manifest as headaches, dizziness, dry heaving, vomiting, anxiety, insomnia, lack of concentration, memory decline, slow reactions, irritability, and a bad temper, among others.