Sagging belly after childbirth is a very common problem. There are some methods that can help restore the firmness of the belly, such as:
1. Do abdominal exercises: Abdominal exercises can help strengthen the abdominal muscles, thereby making the belly tighter. For example, sit-ups, planks, etc.
2. Maintain healthy eating habits: Eating healthy can help reduce weight and thereby reduce belly fat.
3. Use skin care products: Some skin care products can help restore the firmness of the belly, such as products containing collagen and hyaluronic acid.