Cellulitisis a common infection of the skin, almost always triggered by bacteria.

Cellulitis can cause redness, skin swelling, pain, heat at the site, and possibly fever.

Antibiotics are used to treat cellulitis but it’s common for an infection to relapse (recur).

cellulitis

Illustration by Alexandra Gordon for Verywell Health

It can also cause the skin to blister and peel.

Additional symptoms also include:

Cellulitis is a serious bacterial infection of the skin.

If left untreated, cellulitis can spread and cause complications.

cellulitis on a leg

DR P. MARAZZI / SCIENCE PHOTO LIBRARY / Getty Images

If you have symptoms of cellulitis, see your healthcare provider.

This photo contains content that some people may find graphic or disturbing.

Who’s at Risk for Cellulitis?

Cellulitis on a leg

Wendy Townrow / Getty Images

Certain conditions can increase the risk of cellulitis.

There are a few rare causes of less common types of cellulitis.

They can include:

Surgery can lead to cellulitis, even rare types like mycobacterial infections.

A leg with cellulitis

Reproduced with permission from © DermNet New Zealandwww.dermnetnz.org2023.

Those at risk may require different antibiotics upfront, even though most cellulitis cases are brought on by eitherStaphorStrepinfections.

Most people get better quickly and do not require hospitalization.

A healthcare provider may mark the borders of the infection to monitor its growth.

Cellulitis on a foot

Wendy Townrow / Getty Images

Cellulitis often occurs due to another underlying condition.

Treatment for cellulitis also includes treatment of the underlying condition.

Complications

Several complications may arise as a result of cellulitis.

Cellulitis on an ankle

LagunaticPhoto / Getty Images

When to Seek Urgent Care

Cellulitis can be an urgent medical concern.

Keep in mind that older people may be more at risk for infection.

Underlying health conditions also can contribute to the need for urgent care.

William Truswell, MD

Summary

Cellulitis is a skin infection that comes on quickly and can turn serious.

A Word From Verywell

Cellulitis is a common and potentially dangerous skin infection.

All cuts, abrasions, and bug bites should be cleaned and dressed with a band-aid and antibiotic ointment.

If swelling, redness, warmth to the touch, or pain occurs, seek medical evaluation.

When recognized early, treatment can be successful with oral antibiotics.

2021;237(1):142-144. doi:10.1159/000505538

Centers for Disease Control and Prevention.About cellulitis.

2017 Jun 30;27:160. doi:10.11604/pamj.2017.27.160.12007.

2022;55(2):77-83.

2020 Dec 24;10(1):29. doi:10.3390/jcm10010029.

2019 Dec;43(6):804-814. doi:10.4093/dmj.2019.0071.

2017 Jun 20;6(6):CD009758.

Piorunek M, Brajer-Luftmann B, Walkowiak J.Pasteurella Multocida Infection in Humans.Pathogens.

2021 Apr 15;8(7):ofab175.

2022 Nov 19;14(11):e31673.

doi:10.7759/cureus.31673

Centers for Disease Control and Prevention.About vibrio infection.

Fernandez-Bravo A, Figueras MJ.An Update on the GenusAeromonas: Taxonomy, Epidemiology, and Pathogenicity.Microorganisms.

2020 Jan 17;8(1):129. doi:10.3390/microorganisms8010129.

Merck Manual Professional Version.Haemophilusinfections.

Merck Manual Professional Version.Cellulitis.

A State-of-the Art.Front Microbiol.

2016 May 12;7:697. doi:10.3389/fmicb.2016.00697.

2022 Jan 8;17(1):1. doi:10.1186/s13017-022-00404-4.

New Zealand Dermatological Society.Cellulitis mimics.

2020 Sep;50(9):34-40. doi:10.1097/01.NURSE.0000694752.85118.62

MedlinePlus.Septic Shock.