👉 Periphlebitis is a condition in which pus or blood collects in the tissues and organs of the body. This can be caused by an infection, inflammation, or other medical conditions. It's also known as acute periappendicitis, which occurs when the appendix becomes inflamed due to an infection. Periphlebitis can lead to severe pain, fever, and sometimes a condition called appendicitis, which is a serious illness that requires immediate medical attention.