If you're napping because you're not getting enough sleep at night due to insomnia, sleeping too little can also be a headache trigger that naps don't always help relieve. Napping too much can also cause headaches, since oversleeping is also a risk factor for headaches.

Is it normal to wake up from a nap with a headache?

What Causes a Headache After a Nap? A headache after sleeping is generally nothing to be concerned about. It can be explained away by not drinking enough water, sleeping in an odd position that strains your neck, allergies, sleeping too much, or sleeping too little.

Why do I feel sick after a nap?

Why do I feel worse after taking a nap? That familiar groggy feeling is called "sleep inertia," and it means that your brain wants to keep sleeping and complete a full sleep cycle.