Final answer:
The incorrect dermal puncture site among the options provided is the forehead. Dermal puncture is usually performed on the finger, earlobe, or heel in adults and older children.
Step-by-step explanation:
Dermal puncture sites in adults and children older than 1 year include finger, earlobe, and heel. However, the one option that is not a correct dermal puncture site is the forehead. Dermal puncture is a method used in medical procedures to obtain blood samples for testing. It is essential to choose sites that minimize the risk of injury or infection. While fingers and earlobes are common sites for capillary blood sampling in adults, and the heel is commonly used for infants, the forehead is not considered an appropriate site due to the risks of infection and injury. Moreover, the practice of piercing the skin, whether for medical purposes or decorative ones like tattoos and body piercings, can pose risks such as allergic reactions, skin infections, and blood-borne diseases like tetanus, hepatitis C, and hepatitis D.