My wrist hurts so badly when i type. what should i do?

Try to reposition : The keyboard, adjust chair or desk height, try different wrist rests or splints, try a different size or style keyboard, get checked out for arthritis, tendonitis, nerve issues. For modifiaiton remeber one size doesnot fit all a desk and a keyboard can be individaualized infinitely just like an article of clothing or shoes notone size fits all, finally if this persists seek medical attention.