Constipation and blood in breastfeeding is considered to be caused by hemorrhoids, intestinal polyps, anal fissure and other diseases, need to clarify the cause of the disease, choose the appropriate way of treatment, including general treatment, medication and so on. 1. hemorrhoids: lactation constipation blood if it is caused by hemorrhoids, need to change lifestyle, can be treated with nitroglycerin ointment, can improve bleeding. 2. intestinal polyps: lactation with intestinal polyps, will also appear constipation blood. Some of them can disappear on their own, and you should pay attention to your diet and eat more food with dietary fiber. If the polyps are large or malignant, surgery is recommended, such as endoscopic resection, transabdominal colon and rectal resection. 3. Anal fissure: anal fissure can also cause constipation and blood, for breastfeeding women, should take conservative treatment, such as drinking more water, eat more food with dietary fiber. You can take a sitz bath with potassium permanganate solution to promote recovery. If the pain is severe, medications such as topical lidocaine can be applied for relief. There are more causes of constipation and blood pulling during breastfeeding, so it is recommended to consult a doctor for examination and choose an appropriate way to deal with it.