Cellulitis
Also known as: cellulitis, bacterial skin infection, infection of the dermis and subcutaneous tissue, non-purulent cellulitis, erysipelas
Cellulitis is an acute bacterial infection of the deeper layers of the skin and subcutaneous tissue. It usually causes an expanding area of redness, warmth, swelling and tenderness, most often on a lower leg, although any site can be affected. Fever, chills, malaise and swollen lymph nodes may occur. Prompt antibiotic treatment is required because untreated infection can spread and cause serious complications. [S1][S2][S3] Cellulitis usually develops when bacteria enter through a break in the skin, including a cut, ulcer, fissure, insect bite, dermatitis, surgical wound or fungal infection between the toes. Group A Streptococcus and Staphylococcus aureus are common causes, although likely organisms vary with wounds, bites, water exposure, immune status and healthcare exposure. [S3][S4] Diagnosis is usually clinical. A clinician assesses the appearance, rate of spread, systemic symptoms, entry site, comorbidities and possible mimics. Investigations may be needed when disease is severe, recurrent, purulent, atypical, associated with systemic illness or failing to improve. Antibiotics are the core treatment. Route, choice and duration depend on severity, likely organisms, allergy history, comorbidities and local antimicrobial guidance. Elevation, hydration, analgesia and treatment of skin breaks or fungal infection may also be advised. Marking the edge of redness can help monitor spread. [S1][S2][S4] Acupuncture, moxibustion, cupping, gua sha and Chinese herbal medicine must not be used as substitutes for antibiotics or medical assessment. There is no acceptable evidence that they eradicate the bacterial infection. During active cellulitis, local needling, heat, massage, scraping, cupping and topical herbal products over the affected area are contraindicated because they may worsen tissue injury, obscure progression or introduce further infection. [S5]
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Lifestyle & Diet
- •During active infection: Take antibiotics exactly as prescribed and complete the course unless the treating clinician changes it.
- •During active infection: Rest and elevate the affected limb where advised.
- •During active infection: Use recommended analgesia and maintain hydration.
- •During active infection: Mark the edge of redness with the date and time if advised, and monitor spread.
- •During active infection: Keep broken skin clean and follow wound-care instructions.
- •During active infection: Do not massage, scrape, cup, needle, apply moxa or use unapproved topical products over the infected area.
- •Recurrence prevention: Treat athlete’s foot, cracked heels, eczema, ulcers and other skin breaks promptly.
- •Recurrence prevention: Moisturise dry skin while avoiding application between persistently moist toes.
- •Recurrence prevention: Check feet and lower legs regularly if diabetes, neuropathy or poor circulation is present.
- •Recurrence prevention: Manage lymphoedema or chronic oedema with professional guidance, including compression only when appropriate.
- •Recurrence prevention: Wear protective footwear and gloves for relevant work or activities.
- •Recurrence prevention: Do not share towels or personal wound-care items.
- •General health: Optimise diabetes management.
- •General health: Address smoking, obesity, venous disease and reduced mobility where relevant and without stigma.
- •General health: Seek medical advice for recurrent episodes because preventive strategies or specialist review may be needed.
Cautions & Contraindications
- •Absolute: No acupuncture through or adjacent to active cellulitis.[]
- •Absolute: No cupping, gua sha, massage, moxibustion, bloodletting or topical herbal applications over infected tissue.
- •Absolute: No TCM treatment in place of antibiotics, drainage or emergency care.
- •Absolute: No treatment that delays assessment of suspected sepsis or necrotising infection.
- •Relative: Avoid needling oedematous, ulcerated, fragile or poorly perfused skin.
- •Relative: Exercise additional caution with diabetes, immune suppression, anticoagulants and lymphoedema.
- •Relative: Post-infective treatment should begin only when redness, heat, systemic symptoms and spread have resolved.
- •Herbal: Chinese herbal medicine must not replace antibiotics.
- •Herbal: Review allergies, renal and hepatic function, pregnancy, breastfeeding and all medicines.
- •Herbal: Exclude prohibited, restricted, endangered or undeclared substances.
When to reassess or seek care again
- •Medical reassessment is required promptly if symptoms worsen and generally if there is no meaningful improvement within 48 to 72 hours of starting antibiotics. TCM reassessment applies only after the acute infection has resolved.
- •Redness spreads rapidly
- •Fever or systemic illness worsens
- •Pain is disproportionate
- •Blistering, dark skin, crepitus or numbness develops
- •There is no improvement within 48 to 72 hours
- •The infection involves the eye, face, hand, genital region, joint or surgical site
- •The patient is immunocompromised or medically complex
Spread of redness and swelling; Pain and skin temperature; Fever and systemic symptoms; Ability to retain oral antibiotics; Development of pus, blistering, numbness or tissue discolouration; Functional mobility; Recurrence and skin entry sites
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Sources & Further Reading
Clinical guidance, red flags and safety notes on this page draw on the following current sources alongside the classical references above.
Educational reference for licensed practitioners. Not a substitute for individual clinical assessment. Refer to conventional care for any red-flag or undiagnosed presentation.