An afternoon nap is often considered a quick way to recover from tiredness, but some people wake up feeling worse, experiencing headaches, sluggishness, mental fog and heaviness instead of feeling refreshed.
Experts say that an afternoon headache does not necessarily indicate an illness. Sleeping for too long, dehydration, an uncomfortable sleeping position, lying down immediately after eating and napping too late in the day can all contribute to the problem.
A nap lasting more than around 30 to 40 minutes may allow some people to enter deeper stages of sleep. Waking suddenly from this stage can leave a person feeling groggy and may trigger a headache.
Dehydration is another possible factor. If someone has not consumed enough water during the day, they may experience headache or fatigue after waking from a nap.
Sleeping with the neck in an awkward position can also contribute. A pillow that is too high or too low may place strain on the neck and shoulder muscles, potentially leading to a headache.
Experts generally recommend keeping afternoon naps short, around 15 to 20 minutes, while avoiding naps too late in the afternoon. Staying adequately hydrated and maintaining a comfortable head and neck position may also help.
However, recurring or severe headaches should not simply be ignored. If headaches are accompanied by symptoms such as dizziness, vomiting, vision changes or weakness in any part of the body, medical evaluation is advisable.
