What are the methods of examination of hilar rectal abscess?

Anorectal abscess occurs in different parts of the disease, the disease is different, the rapid development of the disease, site limitations, the nature of the pain for the persistent, sitting limited and systemic symptoms such as chills and fever. Anorectal abscess need to do check:

1, rectal examination.
2, B-ultrasound.
3, blood routine examination.