What Happens When We Don’t Sleep Properly For A Week ?

By Vanshika Gaur
17 Jun 2025, 21:00 IST

Not sleeping properly even for just a week can disrupt nearly everything in your body. From slow thinking to weakened immunity, there are numerous side effects that can take place. Tap to know what happens when sleep takes a backseat for seven days.

Severe Fatigue

Without taking proper rest, the body starts to lose energy and may make you feel constantly tired, drowsy, and physically drained.

Mood Swings

Mood swings like irritability, anxiety, and more become common as emotional regulation weakens due to sleep deprivation.

Brain Fog

Brain fog sets in by day three or four. It makes it difficult to concentrate, memory falters, and decision-making becomes harder.

Increased Cravings

Lack of sleep also disrupts hormones like ghrelin (hunger hormone) and leptin (satiety hormone), leading to increased cravings for sugary and salty foods.

Weakens Immune System

Even a week of poor sleep can lower the body’s defence system, i.e., immune system, making you more susceptible to illness.

Skin Starts Ageing Faster

When we don't sleep, our body doesn't get enough time to repair itself, making the skin appear dull and show signs of ageing.

Increased Heart and Blood Pressure

Sleep deprivation also affects blood circulation and may cause spikes in blood pressure and put strain on the heart.

Information Credits

According to PubMed, lack of sleep can lead to mental fatigue, brain fog, increased heart rate, and more. It is advisable to consult a healthcare professional for personalised suggestions.