Hello doc my daughter was sleeping and suddenly she had stiffness on her left arm and she her legs were up and started crying in her sleep after lifting her left hand was stiff for few sec then she was fine what could be the reason and this is first time it has happened

A. may be electrolyte imbalance. in your case a medical examination is required for proper diagnosis and treatment. difficult to tell without examination whether it is normal or not. advisable to remain in contact with your doctor for proper guidance and treatment give paracetamol for pain