Contingent on a positive diagnosis of head lice, you will have the choice to be treated non-chemically or chemically.
A NON-CHEMICAL treatment includes: olive oil, rinse, comb through with NPA comb*, hand picking.
A CHEMICAL treatment includes: RID, rinse, comb through with NPA comb*, hand picking. Signed release of liability required.
Each treatment typically takes an hour per head depending on the severity of the infestation.
*NPA comb information here: https://www.headlice.org/comb/