An 8-month-old baby can typically start eating solid foods and may grow incisor teeth. In terms of motor skills, they can begin to learn how to sit. When caring for an 8-month-old, attention should be paid to a balanced diet and scientific food pairing. If the baby frequently shakes their head, it may be related to a calcium deficiency or a neurological disorder. It is recommended to take the child to the hospital for a check-up and diagnosis for active treatment and nutritional nerve care.