Pruritus ani (intense itching of the perianal region)
Worse at night
Rarer symptoms include abdominal pain, appendicitis and vulvovaginitis or dysuria in females
Worse at night
Enterobius
Idiopathic pruritus ani
Salmonella
Rectal tenesmus
Escherichia coli
Taenia saginata
Clostridium difficile 
Taenia solium 