It is common for people to self harm in secret. A person may do this if they feel their thoughts and feelings aren’t acceptable to others. A person might not want others to know as they may be anxious about what they are thinking
Self harm can be both distressing for both them and loved ones as they may not understand
People self harm in different ways, cutting, burning, scalding, banging or scratching body, sticking sharp objects into body, eating or drinking poisonous things, not letting wounds heal and taking too many tablets