Does it matter if you wake up in the morning and urinate yellow and reddish?

Normal urine is light yellow, some people get up in the morning, you will find that their urine is yellow, even a little red or brown, this situation is not normal? After a few hours of sleep at night, because very little water during sleep, due to drinking less urine, urine often more yellow after getting up in the morning, that is, darker color, this is more normal. However, if the urine is very yellow or even red, you need to go to the hospital for examination. The simplest thing is to do a urine routine examination. If the urine routine is normal, it doesn't matter if there is some yellow urine. If the urine is red or reddish, you still need to do further examination, such as an ultrasound of the urinary system.