A one-month-old baby is always grunting hard, it may be caused by indigestion, stomach discomfort, or it may be caused by cold and flu. 1. If it is caused by indigestion and stomach discomfort: you can give your baby some probiotics to regulate the intestinal flora. In daily life, you can rub your hands hot, you can rub your stomach clockwise to promote intestinal peristalsis. If it is breastfeeding, the mother needs to pay attention to diet, try not to eat spicy and stimulating food, the child’s intestines are not good. 2. A baby catching a cold and flu may cause discomfort, and may also show symptoms such as poor mental state, not wanting to drink milk, and fever. This symptom alone is not enough to diagnose the disease, there may be other factors that cause it. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.