No! Professional and/or household insecticide or fumigant sprays and fogs are not necessary. Once head lice infestation (on a human) is properly and successfully treated, any lice within the home cannot live beyond 24-48 hours, so pest control is not required. It is actually illegal and considered fraud for a pest control company to offer home treatment services for lice. Also, insecticides and fumigants can be toxic if inhaled or absorbed through the skin and pose potential dangerous health risks to family members and pets. Regular vacuuming and laundry are suggested.