Based on your description, it is recommended to drink more warm water, eat more green vegetables and fruits, keep the diet light and avoid spicy and irritating foods, and pay attention to abdominal warmth. Generally, a white tongue coating is caused by cold. If there are no special symptoms, no special treatment is usually needed. If there are symptoms, symptomatic treatment can be applied. After catching a cold, upper respiratory tract infections such as nasal congestion, runny nose, or coughing are more likely to occur. If this happens, medication for treating upper respiratory tract infections can be used, which usually results in significant relief.