To say that your waist hurts in Engpsh, you can say "I have a sore waist" or "My waist hurts." You can also use the phrase "I'm experiencing pain in my waist." If you want to be more specific about the location of the pain, you can say "I have a pain in my lower back" or "I have a pain in my lumbar region." If the pain is severe or chronic, you can say "I'm suffering from chronic lower back pain" or "I'm experiencing severe pain in my waist." It's always a good idea to see a doctor if you are experiencing persistent or severe pain in any part of your body.