What's the problem?

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Across
  1. 1. I bumped into a table and my skin changed colour.
  2. 4. The street was icy and my shoes didn't have good grip.
  3. 7. I ate meat that was past its use-by date and now I'm very ill.
  4. 9. I fell off my bike; I wasn't seriously hurt, but the skin on my knee is broken.
  5. 10. The thermometer says 38.5 degrees.
  6. 12. I've got an itchy bump on my skin from a mosquito.
  7. 13. Help! There's a grape stuck in my throat!!
  8. 15. I injured the muscle in my ankle when I was playing football.
  9. 17. My head hurts.
  10. 18. I didn't see the step and so I fell into the shop.
Down
  1. 2. A wasp hurt me.
  2. 3. My hand has gotten bigger from an allergic reaction.
  3. 5. I have a cold and my chest/lungs feel irritable.
  4. 6. I have hayfever and my nose feels irritable. "Achoo!"
  5. 8. I fell while playing hockey; my leg bone is in two pieces.
  6. 11. I picked up a hot pan without oven gloves.
  7. 12. I went hiking in new shoes and now my feet have little 'bubbles'.
  8. 14. I got my ear pierced, but the skin has gone red with yellow/white liquid.
  9. 16. I felt really dizzy and then I woke up on the floor.