Understanding Bacterial Skin Infections
Skin bacterial infections occur as a result of pathogenic bacteria infiltrating the skin surface or inner layers. They can be caused by injuries such as cuts, scrapes, insect bites, or by a weakened immunity leading to bacterial penetration and amplification. The two most common culprits are Staphylococcus aureus and Streptococcus pyogenes, which can cause a variety of conditions.
Types of Bacterial Skin Infections
Impetigo
Impetigo is a highly contagious superficial infection, which is common in children. It occurs as red ulcers that rapidly leak, exude and form honey-dew crusts.
Cellulitis
Cellulitis is a deep infection of the skin and subcutaneous tissues, with redness, swelling, warmth, and pain. If left alone, it can disseminate into the circulation causing significant morbidity.
Folliculitis
In this disease, hair follicle inflammation is the main feature, which is usually caused by the bacteria or fungi pathogens. It appears as red, pus-filled bumps around hair follicles.
Boils & Carbuncles
Boils are painful, pus-containing swellings resulting from infection of hair follicles, whereas carbuncles are collections of closely interlinked boils. Both are typically caused by Staphylococcus aureus.
Erysipelas
Erysipelas is a superficial infection due to Streptococcus bacteria, which results in sharply defined, erythematous skin plaques. It often occurs on the face or legs.
Abscesses
An abscess is a localised congregation of pus beneath the skin due to bacterial infection. It looks like an enlarged, painful node, and usually its contents need to be drained.
Symptoms of Bacterial Skin Infections
Symptoms have variability depending on the species and the severity of the infection but may involve:-
- Redness and swelling in the affected area.
- Pain or tenderness.
- Warmth around the infection site.
- Pus or fluid discharge.
- Fever or chills in severe cases.
- Skin changes, such as blisters, crusts, or scabs.
Causes & Risk Factors
Bacterial skin infections are caused when bacteria penetrate the integrity of the skin barrier. Common causes include:
- Skin Injuries – Cuts, abrasions, or insect stings can introduce bacteria.
- Poor Hygiene – Poor hygiene increases the risk of infection.
- Weakened Immunity – Conditions like diabetes, HIV, or chemotherapy weaken the immune system.
- Skin Conditions – Issues like eczema or psoriasis provide entry points for bacteria.
- Close Contact – Sharing towels, razors, or personal items spreads bacteria.
Diagnosing Bacterial Skin Infections at Dermavision - The Skin Clinic
At Dermavision - The Skin Clinic, our dermatologists apply modern diagnostic tools to precisely diagnose bacterial infections. These include:-
- Physical Examination – A thorough evaluation of the affected area.
- Swab Tests – Collecting samples of pus or fluid for analysis.
- Blood Tests – Used in serious cases to check for infection spread.
- Imaging Studies – Ultrasound may be needed for deeper infections.
