Cellulitis is an infection of the skin and tissues just under the skin (subcutaneous tissue) caused by bacteria. These bacteria are typically a type called staphylococcus aureus and group A beta-hemolytic streptococcus that enter broken or normal skin and spread to the tissue under the skin. This causes infection and cellulitis.
This problem can affect almost any part of the body but it occurs most commonly in areas that have been damaged or inflamed. Anyone, at any age, can develop cellulitis but you are at increased risk if you smoke, have lowered immunity, or have diabetes or poor circulation.
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There are a range of symptoms here, varying from mild to severe. These include:
The infection can sometimes spread to the rest of the body and in this case the lymph nodes may swell and be noticed as a tender lump in the groin and armpit. You may also have fevers, sweats and vomiting.
Most cases of cellulitis need to be treated with antibiotics but there are other things you can do to help alongside treatment:
Cellulitis is spread by skin-to-skin contact or by touching infected surfaces so wash your hands regularly, bathe or shower daily and cover the area with a gauze dressing.
To help avoid developing cellulitis in the first place, try to avoid scratching or breaking the skin. If this can't be helped, try carefully cleaning any breaks to the skin to reduce the risk of infection.
You should see your doctor urgently if you have symptoms of cellulitis. The area of redness may increase in size but should start to improve after a couple of days of antibiotic treatment. It can be useful to draw around the edge of the red area to see if the size of the red area is increasing or decreasing.
You should seek urgent medical attention if you have a temperature, feel extremely unwell, if the area is extremely painful or if the area of redness is large or increasing in size quickly.
Your doctor will ask you about your symptoms, your medical history and any medications you take. They will then examine the area in question and may take your temperature, blood pressure and heart rate readings. The diagnosis of cellulitis is usually made from the clinical presentation alone, and no specific tests are required. If they are, these may include taking a swab from the skin and sending it to the laboratory for testing, as well as blood tests and sometimes x-rays or scans.
If cellulitis is suspected then you will be given a course of antibiotics. If the cellulitis is severe, the doctor may refer you to the hospital for review and possible antibiotic treatment through an intravenous line.
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