The first thing to consider is anal sinusitis, when the patient eats spicy and irritating food, it may stimulate the anal sinus to produce inflammation, and some patients with constipation or diarrhea may also lead to anal sinusitis, mainly manifested as anal distension and discomfort. If you have a serious sinusitis, it may also lead to a perianal abscess. Patients should pay attention to a light diet, keep their bowels open, and use metronidazole suppositories for anal anti-inflammatory treatment. In addition, other diseases can also cause anal distension and discomfort, such as hemorrhoids, anal fistulas, perianal abscesses and so on. It is recommended that patients with anal distention and pain go to the hospital in time to check the cause of the disease and then take the appropriate treatment.