You need to take care of yourself, before you can take care of another person.

The days, weeks and months after having a child, your time is no longer your own. You are feeding, changing nappies, putting the baby to sleep then doing it all over again and again, and again. Honestly? When choosing between a quick nap or a shower while baby is asleep, you cant be blamed for opting for the former.
But if, like my impossibly knotted hair, signs of neglect start appearing maybe your usually immaculate nails are severely chipped and overgrown, or its been weeks since you brushed your teeth there might be reasons other than being run off your feet to blame.