its a valid question. by itself id say no. coupled with other things like people said like if you already have an issue - you could ask someone or a therapist about it. or loneliness and such.

i talk to myself a lot.
im not sure if it has something to do with my illness. not really sure.
most of the time i cant control it like it just happens. and before i know it its been a couple of hours.
not sure if i did it when i was teen but the past few years its gotten to where i do it in public and i get many looks. but could maybe be from that and how i carry myself too. idk.