It is likely that your child’s bed sheets, pillows, towels etc are infested with lice or nits, so make sure you put them all for a wash. Soak them well in hot water, let them dry in the sun, and iron. Wash all hair brushes and combs daily, until your child’s lice have gone.
Apply castor oil or olive oil on hair. Let the hair soak for few hours. If there is hot sun make kid sit in hot sun for few minutes. Then wash hair using warm water. Try combing the hair. Lice that are soaked in oil and affected by warm water will fall off while combing.