A 4-month-old baby who keeps shaking his head may be related to eczema, excessive sweating, ear disease, vitamin and trace element deficiency. Parents should take their children to the hospital for examination and treatment when this symptom often occurs. The main reason 1, eczema: baby if the head, neck, external ear canal with eczema, itching symptoms, will feel uncomfortable uncomfortable, this time the baby will use the head shaking action to express discomfort; 2, sweating: indoor temperature is too high, or due to the lack of vitamin D, calcium elements, resulting in baby head sweating, skin stimulated by sweat, resulting in prickly itchy feeling, the baby will also shake his head to express 3, ear disease: baby due to cerumen blockage of the ear, or respiratory infection accompanied by otitis media, can cause ear discomfort, coupled with the baby can not directly express in words, can only shake their heads frequently to express the uncomfortable; 4, vitamin and trace element deficiency: baby lack of vitamin D or calcium deficiency leading to rickets occurs, the cerebral cortex excitability increased, the baby will appear often shaking head action;. 5, abnormal neurodevelopment: observe whether the baby has been shaking his head in addition to the change in muscle tone such as unstable head lifting, if muscle tone is also abnormal, it may be caused by abnormal development of the brain nerve or the muscles and nerves of the spine. Treatment 1, babies with eczema are generally not recommended to be treated with topical eczema creams to avoid hormonal stimulation affecting the health of the baby. You can use a medicinal solution to wipe the eczema affected area under the guidance of a doctor to help reduce inflammation and relieve itching; 2. Babies who have been shaking their heads due to sweating need to lower the room temperature or reduce clothing; 3. Babies with ear diseases need active treatment to address ear embolism or inflammation; 4. Add egg yolk and animal liver to the baby’s complementary diet and take cod liver oil in moderation to help supplement vitamin D; take the baby outdoors in the sun more often to help promote calcium absorption; 5. Help promote calcium absorption; 5, if the examination excludes sweating, eczema, ear disease, calcium deficiency and other prone problems, consider checking EEG or CT to prevent brain nerve as well as spinal dysplasia. Note When infants have difficulty sleeping due to head shaking, parents should try to reduce environmental noise, reduce the brightness of the environment to ensure that the baby sleeps in a suitable environment.