Mayo Clinic.
Hemorrhoids
Hemorrhoids (HEM-uh-roids), also called piles, are swollen veins in your anus and lower rectum, similar to varicose veins. Hemorrhoids can develop inside the rectum (internal hemorrhoids) or under the skin around the anus (external hemorrhoids).
Nearly three out of four adults will have hemorrhoids from time to time. Hemorrhoids have a number of causes, but often the cause is unknown.
In Nigeria, cases of Hemorrhoids are very common.
More than 1.5 million cases per year (Nigeria)
Treatable by a medical professional
Usually self-diagnosable
Lab tests or imaging not required
Chronic: can last for years or be lifelong.