Staph bacteria, microbe management and antibiotics

May 13

Written By Global Parents for Eczema Research

We often hear that staph aureus bacteria play a role in eczema flares. So the question often comes up: Would antibiotics that kill staph improve eczema symptoms? The relationship between antibiotic use and eczema is complicated – in short, it cuts both ways.

Does “Staph” make eczema worse?

Managing Staphylococcus aureus (S. aureus , or “Staph”) has become a cornerstone of modern eczema care. While there are many different species of “Staph”, Staph aureus has long been considered to be a contributor to eczema flares and persistence.

To understand why managing bacteria may be helpful for parents of children with eczema, we have to look at S. aureus as more than just a germ. In a healthy child, the skin is like a diverse forest of "good" bacteria. In a child with eczema, S. aureus becomes an "invasive species" that takes over, scaring away the other bacteria and making the skin more reactive and harder to heal.

Once it has colonized the skin, studies in mice suggest that S. aureus has many strategies for making eczema worse:

1. Staph Secretes "Superantigens" (The Immune Hijacker)

Most bacteria trigger a standard immune response. However, Staph produces toxins known as superantigens.

The Effect: These toxins trick the immune system into overreacting. Instead of a targeted attack on the bacteria, the skin’s T-cells go into a frenzy, causing massive inflammation.
The Result: This leads to increased redness and swelling, even if there isn't a "classic" infection with pus or crusting.

2. Staph Punches Holes in the Skin Barrier

Children with eczema already have a "leaky" skin barrier due to low levels of proteins like filaggrin. Staph may make this worse by releasing enzymes (proteases) that literally digest the proteins holding skin cells together.

The Result: This further weakens the barrier, allowing moisture to escape (dehydration) and allergens like pollen or pet dander to enter more easily, triggering more flares.

3. Staph Creates a "Biofilm" (The Protective Shield)

Staph creates a slimy coating called a biofilm that sticks to the skin and inside sweat ducts. This biofilm acts like a suit of armor, protecting the bacteria from the child's natural immune defenses and even some topical treatments. This "clogging" of the pores and the presence of the biofilm can cause intense itching, leading to the "itch-scratch cycle" that further damages the skin.

4. Staph Triggers Mast Cells (The "Itch" Chemicals)

Research has shown that Staph can directly cause mast cells in the skin to release histamine (the chemical responsible for allergies). This means the presence of Staph on the skin may create a physical sensation of itchiness that has nothing to do with dry skin or wool sweaters—it is a direct chemical reaction to the bacteria.

How can you control Staph with antibiotics and other strategies?

Controlling staph is an ongoing area of study and we still have much to learn. Below are some approaches that have been tried with mixed results:

1. The Dr. Aron Regimen (ART)

You may have heard other parents in support groups mention the "Aron Regimen." Developed by Dr. Richard Aron, this is a specialized approach called Antibiotic-Steroid-Moisturizer (ASM) compounding.

How it works: Instead of applying a high-potency steroid once a day, a customized "mix" is created. It typically combines a topical antibiotic (like mupirocin), a corticosteroid, and a moisturizer into one “cream”.

The Strategy: It is applied frequently (up to 4–6 times a day initially) and then very slowly tapered off.
The Logic: By keeping a low level of antibiotic on the skin throughout the day, the goal is to keep the Staph population suppressed so the skin can finally heal without constant flares.
The Controversy: Some have expressed concern about antibiotic resistance with long-term use of topical antibiotics. Others express concerns about the frequent exposure to topical steroids. Consult with a healthcare professional before starting any antibiotic therapy.

2. Maintenance Antibacterial Therapy

If your child has frequent flares, your doctor might suggest "proactive" ways to keep Staph levels low without using constant prescription antibiotics.

Bleach Baths: A very dilute bleach bath (like a chlorinated pool) may reduce bacteria and inflammation. Typically, this involves 1/4 to 1/2 cup of regular household bleach for a full 40-gallon tub. Always consult your doctor for the exact "recipe" for your child’s age and size.
Gentle cleansing: Stick to gentle, fragrance-free, non-soap cleansers. See our recent blog on cleansers for specific tips on non-soap cleansers.
Intranasal Mupirocin: Since Staph often "hides out" in the nose, some doctors prescribe an antibiotic ointment to be applied to the inside of the nostrils for 5 days every month. This can prevent the child from "re-infecting" their own skin by touching their nose and then scratching their legs or arms.
Hypochlorous Acid (HOCl) Sprays: This is a newer, gentler alternative to bleach baths. HOCl is a substance our own white blood cells produce to fight infection. These sprays are non-stinging and can be used on the go to kill surface bacteria without damaging the skin barrier.

Parent Pro-Tip: The "Double Dip" Rule
If your doctor prescribes a compounded cream or even a large tub of moisturizer, never put your fingers directly into the jar. 1. Use a clean spoon or spatula to scoop out what you need.
This prevents you from introducing Staph from your own hands into the cream, which would then be spread all over your child's body the next day.

When are Antibiotics Necessary?

Antibiotics are not recommended for routine eczema care. However, antibiotics are commonly used to treat the secondary bacterial infections that happen because of it.

Signs your child’s eczema might be infected include:

Increased redness, swelling, and warmth.
Weeping, oozing, or pus-filled bumps.
Golden-yellow crusts (honey-colored) on the skin.
A sudden worsening that doesn’t respond to usual treatments.

If you notice these signs, see a doctor. They may prescribe topical mupirocin for small, localized spots or oral antibiotics (like cephalexin) if the infection is more widespread.

Can Antibiotics Cause Eczema?

Research suggests that infants who receive antibiotics in their first year or two of life may have a higher risk of developing eczema later. For information, read our blog on this topic.

One theory is that antibiotics disrupt the developing gut microbiome, which is essential for "training" the immune system. However, it is also possible that the underlying infections—rather than the medicine—are the true trigger. More research is needed to fully answer this question.

The Takeaway

Managing Staphylococcus aureus bacteria is an important aspect of eczema care. Work closely with your pediatrician to devise a bacteria management strategy that works for you and your child.

AI Disclosure: Generative AI was used to develop a draft of this article but it was written and reviewed by humans!

References

Akelma, A. Z., & Biten, A. A. (2015). Probiotics and infantile atopic eczema. Pediatric Health, Medicine and Therapeutics, 147. https://doi.org/10.2147/phmt.s50476

Allen, S. J., Jordan, S., Storey, M., Thornton, C. A., Gravenor, M. B., Garaiova, I., et al. (2014). Probiotics in the prevention of eczema: a randomised controlled trial. Archives of Disease in Childhood, 99(11), 1014–1019. https://doi.org/10.1136/archdischild-2013-305799

Chu, D. K., Schneider, L., Asiniwasis, R. N., Boguniewicz, M., De Benedetto, A., Ellison, K., et al. (2024). Atopic dermatitis (eczema) guidelines: 2023 American Academy of Allergy, Asthma and Immunology/American College of Allergy, Asthma and Immunology Joint Task Force on Practice Parameters GRADE– and Institute of Medicine–based recommendations. Annals of Allergy, Asthma & Immunology, 132, 274-312. https://doi.org/10.1016/j.anai.2023.11.009

Chung, E. J., Luo, C.-H., Thio, C. L.-P., & Chang, Y.-J. (2022). Immunomodulatory Role of Staphylococcus aureus in Atopic Dermatitis. Pathogens, 11(4), 422. https://doi.org/10.3390/pathogens11040422

Fuxench, Z. C., Mitra, N., Del Pozo, D., Hoffstad, O., Shin, D. B., Langan, S. M., et al. (2023). In utero or early-in-life exposure to antibiotics and the risk of childhood atopic dermatitis, a population-based cohort study. British Journal of Dermatology, 191, 58-64. https://doi.org/10.1093/bjd/ljad428

Cited by: 18

Chu, D. K., Schneider, L., Asiniwasis, R. N., Boguniewicz, M., De Benedetto, A., Ellison, K., et al. (2024). Atopic dermatitis (eczema) guidelines: 2023 AAAAI/ACAAI Joint Task Force recommendations. Annals of Allergy, Asthma & Immunology, 132, 274-312. https://doi.org/10.1016/j.anai.2023.11.009

Chung, E. J., Luo, C.-H., Thio, C. L.-P., & Chang, Y.-J. (2022). Immunomodulatory Role of Staphylococcus aureus in Atopic Dermatitis. Pathogens, 11(4), 422. https://doi.org/10.3390/pathogens11040422

Hon, K. L., Tsang, Y. C. K., Lee, V. W. Y., et al. (2015). Efficacy of sodium hypochlorite (bleach) baths to reduce Staphylococcus aureus colonization in childhood onset moderate-to-severe eczema. Journal of Dermatological Treatment, 27(2), 156-162. https://doi.org/10.3109/09546634.2015.1067669