How should vinegar be diluted for treating lice? - briefly
Dilute the vinegar with water at a 1:1 ratio (one part vinegar to one part water) and apply it to the scalp and hair. Leave it on for 10–15 minutes before rinsing.
How should vinegar be diluted for treating lice? - in detail
Vinegar can be used as a supplemental aid in lice management when mixed with water to create a mild acidic rinse. The recommended concentration ranges from 1 % to 5 % acetic acid, which corresponds to diluting household white vinegar (approximately 5 % acetic acid) with water in the following ratios:
- 1 % solution: 1 part vinegar to 4 parts water (e.g., ¼ cup vinegar mixed with 1 cup water).
- 2 % solution: 2 parts vinegar to 3 parts water (e.g., ½ cup vinegar mixed with ¾ cup water).
- 3 % solution: 3 parts vinegar to 2 parts water (e.g., ¾ cup vinegar mixed with ½ cup water).
- 5 % solution: 1 part vinegar to 1 part water (equal volumes).
For scalp application, the lower concentrations (1 %–2 %) are generally preferred to reduce irritation. Apply the diluted mixture to damp hair, ensuring coverage of the scalp and hair shafts. Leave the solution in place for 5–10 minutes, then rinse thoroughly with lukewarm water. Follow with a fine-tooth comb to remove nits and lice.
Safety considerations:
- Perform a patch test on a small skin area before full application.
- Avoid use on broken skin, open wounds, or in children under 2 years of age.
- Do not combine with other chemical pediculicides unless directed by a healthcare professional.
The dilution process should be performed using clean containers and fresh water for each treatment session. Repeating the rinse every 2–3 days for a week enhances removal of newly hatched nits.