Does Baking Soda Kill Demodex Mites?

The short answer: there is no good clinical evidence that baking soda reliably kills Demodex mites living in human skin.

Baking soda, also called sodium bicarbonate, is sometimes suggested online as a cleansing paste, exfoliant, or home remedy. A temporary feeling of dryness or cleanliness does not demonstrate that mites have been killed. Demodex live mainly within hair follicles and associated sebaceous glands rather than freely on the skin surface.

Baking soda should therefore not be considered a proven Demodex treatment. Its alkaline nature and gritty texture may instead aggravate skin that is already dry, red, reactive, or inflamed.

A reliable Demodex treatment must be assessed for effectiveness, concentration, contact time, delivery to the follicular environment, and safety with repeated use. These requirements have not been established for homemade baking-soda mixtures.

Demodex folliculorum is commonly found in hair follicles, while Demodex brevis generally occupies deeper sebaceous and meibomian glands. A product that changes how the skin surface feels does not necessarily reach mites in these protected locations.

Claims that baking soda “kills mites instantly” or that stinging proves it is working should be treated cautiously. Irritation is evidence that the skin is reacting, not evidence of successful mite removal.

Healthy skin has a mildly acidic surface environment that supports barrier function and the normal skin microbiome. Baking soda is alkaline. Applying it to the face can temporarily raise surface pH and may contribute to dryness, tightness, stinging, or barrier discomfort.

This is particularly relevant for rosacea-prone, acne-prone, sensitive, or already-irritated skin. Repeated attempts to “alkalize” the skin may create more inflammation and make it harder to determine what is causing the original symptoms.

Skin pH is only one part of a complex biological environment. Changing it with a home mixture is not a reliable method of controlling Demodex populations.

Using baking soda as a facial scrub combines alkalinity with mechanical friction. Scrubbing may temporarily remove surface oil and loose skin cells, but it can also increase redness, dryness, and discomfort—especially when the skin barrier is compromised.

Do not scrub inflamed areas, broken skin, eyelids, or the delicate skin around the eyes. Homemade baking-soda mixtures are not sterile or formulated for ocular use and should never be placed in the eyes.

If a mixture causes burning, swelling, persistent redness, or worsening irritation, rinse it off with lukewarm water and stop using it.

Choose a gentle and consistent routine instead of rotating through harsh home remedies. Cleanse without aggressive scrubbing, support the skin barrier, and introduce one new product at a time so that any reaction can be identified.

Products used in a Demodex-focused routine should be formulated for the intended area and applied according to their directions. Evaluate changes over time rather than interpreting temporary dryness, tingling, or peeling as proof that mites are dying.

Related guidance: How to Use Our Products, Key Ingredients, and Understanding the Demodex Life Cycle.

Seek professional advice if redness, itching, burning, scaling, bumps, or eye and eyelid symptoms are persistent, severe, rapidly worsening, or difficult to identify. These symptoms can have several causes and do not confirm Demodex by themselves.

Eye pain, light sensitivity, vision changes, significant swelling, or persistent eyelid inflammation should be assessed promptly by an appropriate eye-care professional. Do not use baking soda on the eyelids or around the eyes.

When Demodex involvement is suspected, microscopic examination of suitable skin or eyelash samples may help demonstrate whether mites are present. See How Can Demodex Be Identified?