<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling very depressed lately and also experiencing stiffness all over my body. Can you tell me what might be causing this?  <response>: Based on your symptoms, its possible that youre experiencing a Tic disorder. Its a condition that causes repetitive, involuntary movements or vocalizations. It can often be accompanied by depressive or psychotic symptoms, as well as stiffness all over the body. 