How long should tar soap for lice and nits be left on hair? - briefly
Leave the tar‑based lice treatment on the scalp for about five to ten minutes, following the manufacturer’s instructions and not exceeding the maximum time indicated. Rinse thoroughly afterward.
How long should tar soap for lice and nits be left on hair? - in detail
Tar‑based lice shampoos are designed to remain on the scalp for a limited period before rinsing. Most manufacturers label the contact time as 10–15 minutes. Some formulations, particularly those with higher concentrations of tar, advise a maximum of 20 minutes to avoid irritation. Extending the exposure beyond the stated limit can increase the risk of scalp redness, itching, or dermatitis.
Factors influencing the appropriate duration include:
- Product concentration: Lower‑strength preparations usually require the shorter 10‑minute interval; higher‑strength versions may allow up to 20 minutes.
- User age: Children under six months are generally not recommended for tar treatments; older children and adults can follow the standard timing.
- Hair thickness: Thick or very curly hair may benefit from the full 15‑minute period to ensure the solution reaches the scalp and covers the entire shaft.
- Skin sensitivity: Individuals with a history of eczema or allergic reactions should start with the minimum time and monitor for adverse effects.
Typical application procedure:
- Wet hair thoroughly.
- Apply the tar shampoo evenly, massaging into the scalp and all hair strands.
- Allow the product to act for the time specified on the label (usually 10–15 minutes).
- Rinse hair completely with warm water.
- Comb out dead lice and nits using a fine‑toothed nit comb.
- Repeat the treatment after 7–10 days to eliminate newly hatched insects.
Adhering to the manufacturer’s timing instructions maximizes efficacy while minimizing skin irritation. If irritation occurs before the end of the recommended period, rinse immediately and consult a healthcare professional.