Constipation.
D000293:Adolescent; D001003:Anal Canal / Q000002:abnormalities; D001006:Anus, Imperforate / Q000150:complications; D002648:Child; D002675:Child, Preschool; D003248:Constipation / Q000453:epidemiology / Q000209:etiology* / Q000628:therapy; D005401:Fissure in Ano / Q000150:complications*; D006801:Humans; D007223:Infant; D011611:Psychosomatic Medicine