Feelings of persistent tiredness is a common occurrence.
The NHS claim that unexplained tiredness is one of the most frequent reasons why people see a doctor.
Cases of people being affected with sleep disruption reportedly increased throughout the lockdown - as Wales Online reports.
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A doctor looking at people who are affected by the condition will investigate whether certain lifestyle factors could be playing a part.
The NHS say there are 6 main lifestyle factors that lead to tiredness.
Too much alcohol
According to Drink Aware, the amount of alcohol you consume can have a detrimental affect on your sleeping patterns.
The NHS recommend that you stick to the guidelines of no more than 14 units a week for both men and women.
The right amount of exercise
Research shows that physical activity can also boost self-esteem, mood, sleep quality and energy, as well as reducing your risk of stress.
During the first lockdown ITV's health editor, Dr Hilary Jones, warned viewers against taking naps in favour of exercise.
He said at the time: "Napping during the day is a no-no. If you nap during the day it will definitely impinge on your quality of sleep at night so try to avoid that."
He continued: "If you feel a little bit sleepy in the afternoon, especially after lunch, keep yourself busy. Get up, get going, walk, maybe do your exercise then."
The NHS points out, however, that too much exercise can also affect how tired you feel.
Napping throughout the day
The NHS agrees with Dr Hilary, listing naps as one of the lifestyle factors in feeling tired.
It states: "If you're tired you may nap during the day, which can make it more difficult to get a good night's sleep."
Caffeine
Too much tea, coffee, and energy drinks can upset sleep and make you feel wound-up as well as tired.
If you're a regular coffee drinker many experts recommend having your last cup at least seven hours before you go to bed.
Night shifts
The NHS also points out that night workers often find they get tired more easily and this is more likely if the timing of the shifts keeps changing.
While there can be many reasons for feeling tired all the time the NHS states: "If you have been feeling constantly tired for more than four weeks it's a good idea to see your GP so they can confirm or rule out a medical condition that could be causing your tiredness."
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