An ingrown hair bump, or cyst, extends from your body’s surface and deep underneath it. It often looks like a red pimple with one hair on its surface, but other types can look different and ...

Asymptomatic cyst carriage occurs with E. histolytica as well as E. dispar. Most E. histolytica-infected individuals clear the infection spontaneously, with only about 10% going on to develop colitis.

J Gastroenterol Hepatol. 2010;25(2):244-251.

Lumps can form under the skin for many reasons, including cysts or swollen lymph nodes. Often they don’t require treatment, but if they change in size or appearance, contact a doctor for an exam.