Final answer:
Petechiae are small red spots on the skin caused by blood leaking out of damaged vessels. They are typically seen on the legs or face and are caused by injury.
Step-by-step explanation:
The term for small red spots on the skin that are caused by a tightly tied tourniquet is petechiae. Petechiae are small red or purple spots on the skin that result from blood leaking out of damaged vessels. They are typically seen on the legs or face and are caused by injury, where a blood vessel is severed and blood components leak out of the breaks.