There is a hard lump next to the anus, divided into three cases the most common are thrombosed external hemorrhoids, inflammatory external hemorrhoids, perianal abscess. First, thrombosed external hemorrhoids, once formed, in the clinic, it is recommended that surgical treatment, can do thrombosed external hemorrhoidectomy or thrombosed external hemorrhoid thrombectomy. Second, inflammatory external hemorrhoids, generally recommended to take the conservative treatment of medication, you can use Baiduobang external anti-inflammatory, usually can use potassium permanganate for sitz bath. Third, the possibility of perianal abscess, perianal abscess is generally rectal anal gland infections lead to perianal abscesses in various interstitial spaces, once the diagnosis is clear, all need surgical treatment, even through conservative treatment, inflammation is temporarily controlled, a period of time will certainly reoccur.