Why Do Some People Feel Worse After a Short Nap?

Tuesday, September 08, 2026

SAEDNEWS: A short nap can sometimes cause more tiredness or grogginess due to deep sleep, poor timing, or lack of nighttime sleep.

Why Do Some People Feel Worse After a Short Nap?

According to SAEDNEWS, not every nap produces a feeling of refreshment. Some people may wake up feeling heavy, confused, or even more tired than before. One common explanation is sleep inertia, a temporary period of reduced alertness that can occur immediately after waking. Its intensity can vary depending on how deeply a person was sleeping when the nap ended.

Waking From Deeper Sleep

A nap that lasts longer than intended may allow the body to enter deeper sleep. If a person wakes during this stage, the transition to wakefulness can be difficult. Even when the nap itself is relatively short, individual sleep patterns can influence how quickly deeper sleep begins. Setting an alarm and choosing an appropriate nap duration may reduce the chance of waking up especially groggy.

Nap Timing Matters

The time of day can also affect how a nap feels. Napping too late may interfere with nighttime sleep, while sleeping when the body is not naturally ready for rest may provide less benefit. For many people, an early afternoon nap is easier to fit into the body's natural daily rhythm without significantly disturbing nighttime rest.

taking a nap

Lack of Nighttime Sleep

People who have not slept enough at night may respond differently to a daytime nap. Strong sleep pressure can make them fall asleep quickly and enter deeper sleep sooner, increasing the possibility of sleep inertia after waking. In such cases, improving regular nighttime sleep is generally more helpful than relying heavily on daytime naps.

How to Make a Nap More Refreshing

Keeping naps brief, choosing an appropriate time, and maintaining a consistent nighttime sleep schedule can make daytime rest more comfortable. A quiet, comfortable environment may also help the body rest without unnecessary interruptions. If feeling unusually tired after naps happens frequently despite getting enough nighttime sleep, paying attention to overall sleep quality and daily habits may be useful.