There is no need to state the obvious

We know we look tired. WE ARE TIRED. If after knowing this, you still feel the need to tell us we look tired you run the risk of "accidentally" being poked in the eye with a binkie.

The only exception to this rule is the sentence "you look tired, let me take the baby so you can take a nap."

P.S I am the mother of a good sleeper and I have a helpful husband. if you tell the mother of a bad sleeper or colicky baby, the mother of multiples multiples, a single mother, or a mother who has more than one child under the age of 5 she looks tired you could be seriously injured.