Behaviors that are apparent in those with internalizing disorders include depression, withdrawal, anxiety, and loneliness.[1] There are also behavioral characteristics involved with internalizing disorders. Some behavioral abnormalities include poor self-esteem, suicidal behaviors, decreased academic progress, and social withdrawal.[2] Internalizing one's problems, like sadness, can cause the problems to grow into larger burdens such as social withdrawal, suicidal behaviors or thoughts, and other unexplained physical symptoms.[3]
^Turygin, Nicole C.; Matson, Johnny L.; Adams, Hilary; Belva, Brian (August 2013). "The effect of DSM-5 criteria on externalizing, internalizing, behavioral and adaptive symptoms in children diagnosed with autism". Developmental Neurorehabilitation. 16 (4): 277–282. doi:10.3109/17518423.2013.769281. PMID23617257.