Erysipelas is a bacterial skin infection that develops quickly and often begins with what looks like a small irritation before becoming a clearly defined red, painful, and warm area on the skin. Unlike some other skin infections, it usually has sharp, raised borders that make it easier to distinguish.

The condition mainly affects the upper layers of the skin but can also involve the lymphatic system, which helps the body fight infection. Because of this, it can spread rapidly if not treated early.

It is most commonly caused by group A streptococcus bacteria, which can enter through small breaks in the skin such as cuts, insect bites, or cracked areas. Even minor injuries like athlete’s foot can create an entry point.

Erysipelas often appears on the lower legs but can also develop on the face or other areas of the body. Good skin hygiene and prompt care of small wounds can help reduce the risk of infection.

In addition to skin symptoms, it can cause fever, chills, fatigue, and general weakness. These flu-like symptoms occur as the body responds to the infection, and may appear before the skin changes become obvious.

Swollen lymph nodes near the infected area are also common, reflecting the immune system’s activity. Because symptoms can appear suddenly, the condition is sometimes mistaken for other illnesses early on.

Certain factors increase risk, including poor circulation, lymphedema, diabetes, aging, or a history of similar infections. These conditions can weaken the skin’s natural defenses and slow healing.

Treatment typically involves antibiotics, along with rest and supportive care. Most people improve within a few days, but completing the full course of medication is essential to prevent recurrence or complications.