No, mosquitoes do not die after they bite you. Female mosquitoes bite humans to obtain blood that nourishes their eggs. They can bite multiple times, live for weeks, and continue feeding and laying eggs throughout their lifespan. Unlike bees, which die after stinging, mosquitoes have a proboscis designed for repeated feeding without impairment. The itching from mosquito bites comes from their saliva, not from any damage to the mosquito itself.