Do Bath-Oil Additives Improve Childhood Eczema? A Look at the BATHE Trial
After swim lessons or a muddy game, a bath may be part of the family routine. Some products are poured into the bathwater and others are applied to the skin afterward. Those are different interventions, and an important study looked at one of them.
What the BATHE study tested
The BATHE randomized trial assigned 483 children aged 1 to 11 with eczema to receive emollient bath additives or not receive them. Both groups continued their usual eczema care, including leave-on moisturizers. Researchers measured parent-reported eczema symptoms over 16 weeks and tracked other outcomes over a year.
The study found no evidence that adding the bath additive provided a meaningful clinical benefit beyond standard care in this population. This is not evidence against bathing, against a leave-on moisturizer, or against an individual clinician’s specific plan. Children with very mild eczema and those who bathed less than once a week were not included.
| Item | Why the distinction matters |
|---|---|
| Bath additive | A product added to bathwater; the trial evaluated adding this to standard care. |
| Leave-on moisturizer | Applied to the skin; both study groups continued standard care including leave-on emollients. |
| Prescribed eczema medicine | An anti-inflammatory or other medical treatment with a separate purpose. |
| Bleach bath | A different intervention. Never substitute a bath-oil study for clinical advice about bleach baths. |
A useful question for your own routine
If a bath product irritates the skin or makes a tub slippery, ask a clinician about alternatives and take ordinary fall-prevention precautions. Use lukewarm water and a gentle routine that suits the child. Ask your child’s clinician about moisturizing and any prescribed treatments, especially when skin is open, painful or appears infected.
The trial does not identify the best leave-on moisturizer and did not test #003. If your family likes an additive, the decision to continue is individual; use the label and your clinician’s advice rather than treating the study as a verdict on every bath product.
Compare moisturizing after a shower with what research says about pools and bleach baths.
Dr. Arsy Hydration Recovery Moisturizer #003, 4 oz is a fragrance-free cosmetic moisturizer for dry, sensitive and eczema-prone skin. Follow its current label and your clinician’s advice. It does not treat or cure eczema.
Sources and further reading
- BATHE randomized trial: Bath additives for childhood eczema.
- NIHR report: BATHE trial.
- NIAMS: Atopic dermatitis care.
Educational information from Dr. Arsy; not a diagnosis or individual medical advice. The researchers and organizations cited do not endorse Dr. Arsy products. Image is an AI-generated editorial illustration.