My tongue is peeling off in patches starting from the end . i'm worried that it may be something serious. it looks like spots are missing ?

Tongue patches: you probably have a condition known as geographic tongue and the cause is unknown in most cases. Try to avoid hot or spicy food and try to avoid toothpastes with whitening agents, since these things can make your tongue problem worse. It can last weeks to months but will generally get better. If it becomes more painful and persists, see your doctor or dentist about it. Good luck!