1. Unreasonable diet: Even if you exercise every day, if the calorie intake still exceeds the calorie intake, the weight loss effect will be affected. I suggest you pay attention to your diet, control your calorie intake, choose foods with low fat and high fiber, and avoid excessive drinking and eating snacks.

2. Incorrect exercise: If the exercise is incorrect, it may lead to poor weight loss. It is suggested that you consult a professional fitness coach to understand the correct exercise methods and skills in order to achieve better weight loss.

3. Decreased body metabolic rate: Postpartum body metabolic rate will decrease, which is also one of the reasons why it is difficult to lose weight. It is suggested that you increase the time and intensity of aerobic exercise, improve the metabolic rate of the body and promote fat burning.

4. Lack of sleep: Lack of sleep will affect the body's metabolism and hormone secretion, thus affecting the weight loss effect. It is recommended that you ensure adequate sleep time, 7-8 hours every night.

5. Excessive stress: Excessive stress will lead to hormonal imbalance and affect the weight loss effect. I suggest you learn to relax yourself and reduce stress. You can relieve stress through yoga and meditation.

In short, if you want to lose weight successfully, you need to comprehensively consider many aspects such as diet, exercise, sleep and psychology. I suggest you make a scientific weight loss plan, stick to it and seek professional help if necessary.