You have broken your arm/leg.
You have got a headache/backache.
You have caught a cold/flu.
Have you got a stomachache?
Don't eat a lot of sweets.
You have a sore throat and a bad cough. You also have a high temperature.
Go to the hospital for an X-ray.
You don't want a toothache!
Get some rest, and drink lots of hot drinks.
Don't drink a lot of cola and lemonade.
Take some medicine/antibiotics.
Take some painkillers/pills.