People block unpleasant memories from their childhood knowingly or unknowingly. Some unpleasant memories from your childhood could be being beaten by your parents after disobeying them. Being abused by an adult when you are a child could bring trauma, blocking that memory. Child abuse heavily impacts children’s mental health and development; the brain may block the incident to prevent trauma.
Getting bullied in school with older kids or peers affects a child’s self-esteem slowing progress in class, social interactions, and general performance, so bullying gets blocked from the memory bank as it’s unpleasant not worth reminiscing. Experiencing a robbery in your home by armed robbers is not pleasant in your childhood, and the memory could be blocked from your mind when growing up to create space for pleasant memories. Parents’ divorcing or separation affects their children as there might not be a stable family due to shared custody.
Other childhood memories that might be blocked are poor school performance, losing family members and friends, pressure from your parents to choose a subject you don’t like in school, getting kidnapped for ransom could bring nightmares to a kid. All these unpleasant memories get blocked to create space for better events plus good mental health.