Why does your one year old keep hitting herself?

A one-year-old may hit herself as a way to express frustration, seek attention, or explore her own physical sensations. At this age, children are still developing their emotional regulation and understanding of their environment. It's important to observe the context of the behavior and provide comfort, redirection, or distractions to help her express her feelings in healthier ways. If the behavior persists or escalates, consulting a pediatrician may be advisable.