My daughter 4 years 6 months old her weight 20 kg and height 107 .suddenly she change her neck movements like duck she is moving her neck like duck m very worried about her changing behaviour please is this anything serious

A. Hello mom one os just because of playing she might’ve doing also their is definitely their would be change of behaviour as well,sit give them to the child talk and teach them the correct habits as well , but in case you find it quite abnormal then get her once examined