what is the cure on 1 year child tonge at the very end is read and swollen she cry every time she eats or drinks anything

Does she have lupus?  (You posted in the lupus community)

Because 1 year old is so young, an infection can become a serious thing quite quickly.  You need to check often if she has a fever, and if one develops, get her to a doctor.  If there is no fever or other signs, I would imagine that she hurt her tongue.  Bit it perhaps?  Or has a tiny white bump on it somewhere?  (A canker sore)A little of that teething medicine will numb it for a bit to help her eat.  So will ice cubes or a cold drink.  Don't put anything in the mouth that cannot be ingested (of course): no medicines, cleaners, etc.  Just salt water to clean out the wound, if there is one, and teething pain medicine like Orajel or Anbasol.  

And if it isn't better with 24 hours, call a doctor to see if there could be something other than an "owie" going on.  

All the best,
Cathy