U can try stopping the shampoo if there is no improvement. Use shampoos which contain permethrin 1 percent , u can leave it on for 10 min and wash off then comb ur hair with the lice removing comb . Repeat this weekly if there are live lice Then also make sure that there is no secondary infection which may require additional antibiotic treatment as well. Consult a dermatologist if still not relieved
Next Steps
Start using a shampoo which contains permethrin 1 percent like perlice rinse
Health Tips
Always make sure to get treatment for all those who are infected at the same time