Cellulitis
Sources consulted
This article is original patient-education content.
- WHO—Health topics A–Z(2024)
- NHS—Health A to Z(2024)
- CDC—Health topics(2024)
Based on international clinical guidelines
Overview
Cellulitis is a common bacterial infection of the deeper layers of your skin. It makes the skin red, swollen, hot, and painful. It usually happens on your legs, but can appear anywhere on your body. Cellulitis is not the same as cellulite (the bumpy fat under the skin).
Key facts
- Cellulitis is caused by bacteria, usually streptococcus or staphylococcus, that enter through a break in the skin.
- It is treatable with antibiotics, but it needs prompt medical care to prevent complications.
- Cellulitis can affect anyone, but people with certain health conditions are more at risk.
Yes, cellulitis is a common skin infection. It affects many people each year, especially adults over 45 years old.
Cellulitis can happen to anyone, but it's more common in people who have a weakened immune system, diabetes, or skin problems like eczema. It also affects people who have recently had surgery or a skin injury.
Symptoms
- The redness is spreading very quickly, especially near your eyes or genitals
- You have a very high fever (above 39°C or 102°F) that doesn't come down
- You feel confused, drowsy, or have trouble breathing
- You have a rapid heartbeat or chest pain
- ⚠You have a fever or chills
- ⚠The redness and swelling are getting worse after starting treatment
- ⚠You have a new area of redness that is very painful
Common symptoms
- Redness and swelling of the skin that spreads quickly
- Warmth in the affected area
- Pain or tenderness
- Fever (temperature above 38°C or 100.4°F)
- Chills and feeling unwell
- Blisters or a 'peau d'orange' (orange-peel) look on the skin
Symptoms in children
- Fussiness or irritability
- Redness and swelling, often on the face or legs
- Fever and chills
- Crying when the area is touched
Symptoms in older adults
- Confusion or feeling very tired
- Redness and swelling may be less obvious but pain is still present
- Fever or low body temperature
- Loss of appetite
Causes
Main causes
- Bacteria (like streptococcus or staphylococcus) entering through a cut, scrape, insect bite, surgical wound, or cracked skin
- Pre-existing skin conditions like athlete's foot or eczema that let bacteria in
Risk factors
- Having a weakened immune system (from chemotherapy, HIV, or medications like steroids)
- Diabetes, especially if blood sugar is not well controlled
- Being overweight (obesity)
- Having lymphedema (swelling from damaged lymph vessels)
- Having had cellulitis before
- Poor blood circulation in your legs (like from varicose veins)
When to see a doctor
See a doctor urgently if:
- You have a fever or chills along with skin redness and swelling
- The redness is spreading quickly or getting worse
- You have a chronic condition like diabetes and think you have cellulitis
Book a routine appointment if:
- You have a small area of redness that is not getting better after 2 days of home care
- You have symptoms of cellulitis but are otherwise well
Diagnosis
A doctor will diagnose cellulitis by looking at your skin and asking about your symptoms and medical history. They can often tell it's cellulitis based on the redness, swelling, warmth, and pain.
Tests that may be done
- Blood tests to check for infection and how your body is responding
- A swab of any fluid or wound to find out which bacteria is causing the infection
- Sometimes an ultrasound or other imaging if the infection is deep or if there is swelling
What to expect at your appointment
The doctor will examine the red area and check your temperature. They may mark the edge of the redness with a pen to see if it spreads. You might have blood taken or a swab. Most people are diagnosed quickly and start treatment the same day.
Treatment
Cellulitis is treated with antibiotics to kill the bacteria. Most people take antibiotics by mouth for 7 to 10 days. For more serious infections, you may need antibiotics through a needle in a vein (intravenous or IV) in the hospital. Resting and elevating the infected area helps reduce swelling.
Self-care at home
- Rest and raise the affected limb (for example, on pillows) to ease swelling
- Drink plenty of fluids to stay hydrated
- Take over-the-counter pain relief like paracetamol or ibuprofen for fever and discomfort (check with your doctor first)
- Keep the skin clean and dry, but do not use any creams or ointments unless prescribed
Medical treatments
Your doctor will prescribe antibiotic tablets or liquid. It's important to finish the whole course, even if you feel better. For severe cases, you may need to stay in the hospital for IV antibiotics. Your doctor may also treat any underlying skin conditions, like athlete's foot, to prevent it from happening again.
When is surgery considered?
Surgery is rarely needed for cellulitis. However, if an abscess (a pocket of pus) forms, a doctor may need to drain it with a small procedure.
Living with this condition
During treatment, rest as much as you can and keep the infected area raised. It may take a few days for the redness and swelling to start going down. Finish all your antibiotics, even if you feel better. The skin may peel or be flaky as it heals – this is normal.
Lifestyle tips
- Check your skin daily for any cuts, blisters, or redness, especially on your feet and legs
- Moisturise dry skin to prevent cracks that can let bacteria in
- Wear protective footwear and gloves when gardening or doing DIY
Diet and exercise
There is no special diet for cellulitis, but eating a balanced diet with enough protein and vitamins helps your body heal. Gentle activity, like walking, is fine as long as you rest the affected area. Avoid heavy exercise that might strain the area.
Mental health and emotional wellbeing
Having cellulitis can be worrying, especially if it's painful or keeps coming back. It's normal to feel anxious or frustrated. Talk to your doctor or a counsellor if you feel overwhelmed.
Prevention
Yes, many cases can be prevented. Keep your skin clean and moisturised. Treat cuts, scrapes, and bites quickly with antiseptic and a clean bandage. Manage long-term conditions like diabetes and eczema well. If you have athlete's foot, treat it promptly to prevent cracks between your toes.
Complications
If left untreated
- The infection can spread deeper into your body, causing a serious bloodstream infection (sepsis)
- An abscess may form that needs draining
- In rare cases, the infection can affect your lymph vessels (lymphangitis) or spread to bones and joints
Long-term outlook
With prompt antibiotic treatment, most people with cellulitis recover fully within a week or two. The outlook is very good. If you have recurrent cellulitis, your doctor can suggest ways to reduce the risk. Serious complications are rare when treated early.
Find support
International organisations
Local organisations
- NHS – Cellulitis ↗ · United Kingdom
- British Skin Foundation ↗ · United Kingdom
Helplines
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.