Answer:
Some internal reasons might be to relieve pain, both physical and emotional as Codeine can induce a high. The high is addictive. Another reason would be for the side effects, such as drowsiness which can feel like a high. An external reason would be weight, as the class of drug Codeine is in is an opioid. Opioids can cause weight loss, and unrealistic standards of beauty may give a teen the want to loose weight.
Answer: you can tell if they are limping or walking strange and or have a swelled up ankle they probably sprained it if you are unsure you can always ask an adult or professional for help.
Because when people are educated, they are aware of the social values and the events happening around.