The anus always want to defecate but can’t, may be caused by sinusitis, enteritis, constipation, etc., need to choose reasonable medication according to the specific cause. 1. Sinusitis: acute and chronic inflammation of the anal valve, sinus, localized redness and swelling, even with pus can stimulate the anus, always want to defecate but can not be discharged, can be under the guidance of the doctor, oral levofloxacin capsules, metronidazole tablets and other drugs for symptomatic treatment. 2. enteritis: intestinal mucosa congestion, edema, or even erosion, ulceration, can cause abdominal pain, diarrhea, rectal irritation symptoms, such as defecation, the sense of exhaustion and other symptoms, can be under the guidance of the doctor, oral bifidobacterium quadruple live bacterial tablets, lactobacillus tablets, mesalazine tablets, and other medications to regulate the treatment. 3. Constipation: If there is no organic lesion in the intestinal tract, it may be the cause of constipation, you can use lactulose oral solution laxative under the guidance of a doctor; if the export of obstructive constipation leads to the need for further examination to clarify the cause of the disease, the effect of medication is not generally obvious, or perhaps the need for surgical treatment to remove the original disease. The anus always want to defecate and can not come out, need to be reasonable regular light diet, moderate exercise to enhance resistance, the effect of medication is not obvious, you need to go to the hospital in a timely manner to further clarify the cause of the disease, do not blindly use their own medication, so as to avoid misunderstanding the condition.