I am 22 yrs old i noticed blood in my saliva in the morning wen i spat what can be the reason ?

Probably nothing: It's likely nothing to worry about. How is your oral hygiene? If your gums are a bit reddish, then a drop of blood mixed w/ ur saliva may seem like a lot of bleeding. Make sure you brush & floss well regularly & your gums' health will improve. If you r a smoker, sometimes a drop of blood from throat due to irritation can show up with your saliva & seem more than it is. See ur dentist if continues