There’s a lot of confusion around words like “tolerance,” “dependence,” and “addiction.” Sometimes people use them interchangeably. However, they have very different definitions. Let’s look at what ...

Pain tolerance refers to how much pain a person can reasonably handle. Some people may have a higher pain tolerance than others. Genetics, age, and other factors can affect a person’s pain tolerance.

Caffeine is a stimulant found naturally in beverages like coffee and tea. It’s also added to others, such as energy drinks and soda. Caffeine increases chemicals in your brain that improve mood, ...