Napping isn't for everyone.
And some people simply can’t nap – either because of work commitments or because they aren’t able to actually fall asleep during the day.
Napping can also have negative effects for some - such as:
Waking up feeling groggy
Not being able to sleep at night.
Generally short daytime naps shouldn’t affect nighttime sleep quality, but if you already suffer from insomnia it could make that worse.