Trauma is a psychological response to an event which involves intense physical or emotional distress. Traumatic events can be both single incidents, such as an accident or a violent act, or repeated occurrences which can lead to long-term, chronic trauma. It can be caused by both intentional and unintentional events, with effects ranging from emotional distress to physical injury or death. When a traumatic event occurs, people typically experience a variety of physical and emotional reactions. These can include fear, anxiety, confusion, shock, and grief. The psychological reactions are often overlaid with physical reactions such as increased heart rate, sweating, feeling shaky, and difficulty breathing. In the immediate aftermath, people may be withdrawn, unable to sleep or concentrate, irritable, and easily startled. Over time, symptoms may persist and worsen and include post-traumatic stress disorder (PTSD). Trauma can have a significant impact on mental health. People who have experienced a traumatic event may be at risk for developing a range of mental health issues such as depression, anxiety, substance abuse, and suicidal thoughts and behaviors. It can also lead to difficulties in relationships, work, and day-to-day functioning. It is important to seek help in dealing with trauma.