The reason why the hemorrhoids burst of pain may be the formation of thrombosed external hemorrhoids, external hemorrhoids surface breakage or external hemorrhoids secondary infection, if this situation, it is recommended to timely medical standardized and reasonable diagnosis and treatment. 1. thrombosed external hemorrhoids is an acute thrombosis of the external hemorrhoids, the pain is often severe, the degree of pain is mainly with the size of the thrombus and the anal sphincter, usually take timely surgical treatment. 2. external hemorrhoids exposed on the surface of the human body is often easy to break, once broken will produce pain, this pain is lighter than thrombosed external hemorrhoids, this situation needs to be timely medical treatment. 3. external hemorrhoids secondary infection, hemorrhoids occur in the anal canal, the anal canal is a non-clean area, there is often a large number of bacteria, coupled with the external hemorrhoids are very easy to break, so it is very susceptible to infection, the infection produces a variety of inflammatory factors, the inflammatory factors will stimulate the nerve endings to produce a sense of pain, the occurrence of this case, please consult a doctor in time to deal with. Hemorrhoids appear bursts of stinging pain, need to be actively consulted as soon as possible, clear cause of the targeted treatment, in accordance with the doctor’s instructions, to avoid delay aggravation of the condition.