 [ Symptoms ] how often are radiation andor chemo treatments given for colon cancer [ Disease ] probably an abcess or boil use warm compresses to try to get it to pop if you are unable to get it to head to pop get to a doctor as they will have to lance it in order to get the infection out ive had two in my armpit and my hubby had one in his belly button they hurt like outrageously bad until they finally pop