A lump growing between the anus and vulva is not very common in clinical practice. However, according to the shape, nature, symptoms, etc. of the mass, coupled with the relevant examination, it can basically determine what kind of disease it is and treat it accordingly. In the clinical anal and vulva between the mass, common in the following cases: a, perianal abscess. Perianal abscess is also a relatively acute disease, caused by the expansion of the scope of local inflammation due to infection. It is often accompanied by redness, swelling, heat, pain and other clinical manifestations, and can be diagnosed according to physical examination and relevant laboratory tests. Generally, it needs to be treated by surgical incision and drainage of pus. Second, anal boils, is a relatively rare disease. However, it is usually not accompanied by pain and requires appropriate tests to confirm the diagnosis. Symptomatic incision, excision of infected tissue, basically can be cured, pay attention to prevent infection.