Detection of nits, nymphs or adult lice is the only way to confirm the presence of lice. It requires a thorough examination of the scalp. Nymphs and adults move quickly and are often difficult to observe. Finding nits close to the scalp is the usual way to confirm an infestation. Head lice do not transmit any diseases.
Sores caused by scratching and crusting can result in secondary bacterial infections.
The instructions of your health care provider and the product label should be followed carefully when using any pesticide medication. Treatment failures are common. If active lice are observed 8-12 hours after treatment, consult again with your health care provider regarding the use of a different product. Thus, it is extremely important that the hair and scalp be thoroughly checked every 2-3 days after treatment and all nits and lice are removed with a nit comb. Most head lice products recommend a second treatment in seven to 10 days after the first treatment in order to kill any nymphs which emerge from the eggs.