Child sexual abuse is a form of child abuse in which an adult or older adolescent uses a child for sexual stimulation. Forms of child sexual abuse include asking or pressuring a child to engage in sexual activities (regardless of the outcome), indecent exposure (of the genitals, female nipples, etc.) to a child with intent to gratify their own sexual desires or to intimidate or groom the child, physical sexual contact with a child, or using a child to produce child pornography.

The effects of child sexual abuse can include depression, post-traumatic stress disorder, anxiety, propensity to further victimization in adulthood, and physical injury to the child, among other problems. Sexual abuse by a family member is a form of incest, and can result in more serious and long-term psychological trauma, especially in the case of parental incest.