What could be the reason for noticing that the head is tilted when standing up straight?

Under normal circumstances, possible causes of noticing a tilted head when standing upright include poor posture, congenital torticollis, and cervical spondylosis. It is recommended to seek medical attention promptly and, under a doctor's guidance, use medications and lifestyle modifications for treatment.

1. Poor posture: Prolonged incorrect sitting or standing posture may cause the head to tilt to one side, leading the body to develop habitual muscle memory. This results in the observation of a crooked head when standing straight. It is advised to maintain proper sitting and standing postures and cultivate healthy habits.

2. Congenital torticollis: This condition typically refers to a congenital disorder in which the head is persistently tilted to one side. Specific symptoms include facial asymmetry and differences in the appearance of the two sides of the face, which can lead to the observation of a tilted head when standing upright. If necessary, treatment options such as sternocleidomastoid muscle lengthening or sternocleidomastoid muscle release surgery may be performed under a doctor's guidance.

3. Cervical spondylosis: This condition is generally caused by degenerative changes in the cervical intervertebral discs due to factors such as disc herniation or muscle strain. Symptoms may include numbness in the body and tinnitus. In patients with cervical spondylosis, prolonged compression of the intervertebral discs can lead to disc protrusion, resulting in a visibly tilted head when standing straight. It is recommended to take medications such as mecobalamin tablets or tizanidine hydrochloride tablets under medical supervision for treatment.