Cellulitis: Symptoms, Treatment, and When to Seek Medical Care
Cellulitis, skin infection
Cellulitis is a bacterial skin infection that affects the deeper layers of the skin and soft tissue. It often causes an area of skin to become red, warm, swollen, painful, and tender.
Cellulitis can start after bacteria enter through a cut, scrape, insect bite, cracked skin, athlete’s foot, eczema flare, wound, or other break in the skin. It can happen anywhere on the body, but it is common on the legs, feet, arms, and hands.
What does cellulitis look like?
Cellulitis may cause:
Redness
Warmth
Swelling
Pain or tenderness
Skin tightness
Skin that feels hot to the touch
A rash-like area that spreads
Blisters in some cases
Fever or chills
Swollen lymph nodes
Red streaking from the infected area
The affected area may grow larger over time. Sometimes the redness spreads quickly.
Common causes
Cellulitis is usually caused by bacteria, often streptococcal or staphylococcal bacteria. These bacteria can enter the skin through small openings, even ones that are hard to see.
Common entry points include:
Cuts or scrapes
Bug bites
Burns
Cracked dry skin
Athlete’s foot
Eczema or dermatitis
Surgical wounds
Ingrown toenails
Skin ulcers
Injection sites
Animal or human bites
Who is at higher risk?
Some people are at higher risk for cellulitis, including those with:
Diabetes
Poor circulation
Lymphedema
Chronic leg swelling
Weakened immune system
History of cellulitis
Skin ulcers or wounds
Athlete’s foot
Obesity
Recent surgery
IV drug use
Eczema or frequent skin breakdown
Is cellulitis contagious?
Cellulitis itself is usually not spread person-to-person through casual contact. However, the bacteria that cause skin infections can spread through direct contact with infected wounds, drainage, contaminated towels, or shared personal items.
Good handwashing and wound care are important.
Cellulitis vs. abscess
Cellulitis is a spreading skin infection. An abscess is a pocket of pus under the skin. An abscess may feel like a painful lump, boil, or bump that is soft, swollen, or draining.
Abscesses often need in-person evaluation and may need drainage. Antibiotics alone may not be enough if there is a significant abscess.
When to seek medical care
Schedule a medical evaluation if you have:
Red, warm, swollen, painful skin
Redness that is spreading
Skin infection after a cut, bite, burn, or wound
Drainage or pus
Blisters
Fever or chills
Swollen lymph nodes
Diabetes
Poor circulation
Weakened immune system
Chronic leg swelling
Infection on the face, hand, foot, or near the eye
No improvement after 24-48 hours of antibiotics
Recurrent cellulitis
When to seek urgent or emergency care
Seek urgent or emergency care for:
Rapidly spreading redness
Fever, chills, or feeling very ill
Red streaks traveling from the area
Severe pain
Pain that seems worse than the skin appearance
Numbness or skin discoloration
Confusion
Fainting
Fast heart rate
Low blood pressure symptoms
Infection near the eye
Facial swelling
Infection after an animal or human bite
Large abscess or significant pus
Diabetes with foot infection
Weakened immune system with infection
Symptoms that are rapidly worsening
These symptoms may suggest a more serious infection or need for IV antibiotics or urgent evaluation.
Can telehealth help?
Telehealth may help evaluate mild possible cellulitis when symptoms are limited, the patient is stable, and clear photos or video are available. A telehealth visit can help discuss symptoms, risk factors, antibiotic options when appropriate, wound care, and whether in-person care is needed.
However, cellulitis often needs careful monitoring. In-person care may be needed if the infection is rapidly spreading, severe, recurrent, associated with fever, near the eye, on the face, hand, or foot, related to a bite, or if the person has diabetes, poor circulation, immune suppression, or significant swelling.
Prevention tips
To help reduce the risk of cellulitis:
Clean cuts and scrapes promptly
Keep wounds covered until healed
Wash hands before and after wound care
Moisturize dry cracked skin
Treat athlete’s foot
Avoid scratching bug bites or rashes
Keep nails trimmed
Wear protective footwear outdoors
Manage diabetes and blood sugar if applicable
Monitor feet regularly if you have diabetes or neuropathy
Address chronic leg swelling with medical guidance
Avoid sharing towels, razors, or personal items
Final thought
Cellulitis can start small but may spread quickly. Red, warm, swollen, painful skin should be evaluated, especially if symptoms are worsening, spreading, or associated with fever. Early treatment can help prevent complications.
This information is for educational purposes only and does not replace medical advice, diagnosis, or treatment. If you are experiencing severe symptoms, signs of infection, severe allergic reaction symptoms, trouble breathing, or a medical emergency, call 911 or go to the nearest emergency room.
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