Student or Learner
1) Your had is hurt/twisted so you really have to look after it properly.
2) Your had is hurt/twisted so you need to look take care of it properly.
3) Your need will need a proper care because it's hurt.
4) Your're sick so you need to look after yourself properly/ take a good care of yourself.
Sorry for my negligent, thank you very much for helping me.
You have a wonderful night.