Analysis of illness: Severe constipation requires rapid defecation, which can be treated by oral lactulose oral solution or gastrointestinal motility drugs. Constipation is mainly due to the slow gastrointestinal peristalsis, the accumulation of feces in the intestine for too long, and a large amount of water is absorbed, which leads to dry stool and difficulty in defecation. The rapid defecation method is that lactulose oral solution can be taken orally, which can soften the stool and promote defecation. In addition, drugs that can improve gastrointestinal motility can also be taken orally, such as mosapride citrate tablets and itopride hydrochloride tablets, to promote gastrointestinal peristalsis and effectively defecate. You can also take probiotics orally to regulate intestinal flora, thus improving the symptoms of constipation. In addition to medicines, you can drink more water and yogurt, supplement intestinal probiotics, eat more crude fiber foods, such as vegetables and coarse grains, and eat more fruits that are beneficial to gastrointestinal laxation, such as bananas, pitaya and pears. In addition, we should pay attention to going to the toilet on time in our living habits and develop the habit of regular defecation. In drug therapy, laxatives can be taken orally to help excretion, which can stimulate intestinal secretion and reduce absorption, increase osmotic pressure and hydrostatic pressure in intestinal cavity, and play a role in catharsis. It can be divided into stimulating laxatives, such as rhubarb, senna, phenolphthalein and castor oil. Such laxatives are not recommended for long-term use, which can lead to melanosis coli and may cause serious drug dependence, but will aggravate constipation. There are also inflammatory laxatives such as magnesium sulfate; Osmotic laxatives such as mannitol and lactulose; Expansive laxatives, such as bran, methylcellulose, polyethylene glycol, agar, etc.