This pain is usually caused by intense muscle spasms in or around the canal of the anus. The pain is slightly different in levator ani syndrome, and may last days instead of minutes. Anyone can experience proctalgia fugax. The symptoms of proctalgia fugax are muscles spasms in or around the lower rectum area or in or around the canal of the anus. The pain or spasm happens suddenly, and usually without warning. The pain can be severe and will last for only a few seconds, although it can last up to 30 minutes in some cases.
Rectal spasms proctalgia fugax can cause pain in the rectum. The cause of the spasms is unknown. Most people who have rectal spasms have episodes of sharp pain or severe cramps that last from several seconds to several minutes. The episodes may occur several times a year. Both men and women can be affected. It is uncommon in children before the age of puberty. People with abdominal problems, such as peptic ulcer disease or irritable bowel syndrome, are more likely to have rectal spasms.
Medical University of South Carolina Digestive Disease Center
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Proctalgia fugax , a variant of levator ani syndrome , is a severe, episodic pain in the regions of the rectum and anus. It most often occurs in the middle of the night  and lasts from seconds to minutes;  pain and aching lasting twenty minutes or longer would likely be diagnosed instead as levator ani syndrome. In a study published in involving patients, the attacks occurred in the daytime 33 per cent as well as at night 33 per cent and the average number of attacks was Onset can be in childhood; however, in multiple studies the average age of onset was Many studies showed that women are affected more commonly than men,  but this can be at least partly explained by men's reluctance to seek medical advice concerning rectal pain.