Feeling tired after 8 hours of sleep often points to poor sleep quality, not just quantity, caused by stress, inconsistent schedules, bad sleep hygiene (screens before bed), or hidden issues like sleep apnea, thyroid problems, nutrient deficiencies (iron, B vitamins, D), or underlying conditions like anxiety or anemia, disrupting deep, restorative sleep stages. Improving your sleep environment and habits is key, but persistent fatigue warrants a doctor's visit to rule out medical causes.
If you or a loved one feel sleepy or fatigued, despite having 7-8 hours of sleep, it could indicate poor sleep quality or be a sign of an underlying sleep disorder. If you have questions or concerns about your sleep health, please speak with your primary care provider.
10 hours before bed: No more caffeine. 3 hours before bed: No more food or alcohol. 2 hours before bed: No more work. 1 hour before bed: No more screen time (shut off all phones, TVs and computers).
Not feeling rested after sleeping could be due to disruptions in your sleep stages, especially if you need to reach or spend more time in the deep sleep phase, which is crucial for feeling refreshed. It could also be related to sleep disorders, stress, or other sleep quality factors.
Fatigue red flags signal potentially serious issues beyond normal tiredness, including unexplained weight loss, persistent fever, night sweats, shortness of breath, chest pain, severe headaches, confusion, or new neurological/joint problems alongside exhaustion. Other signs include fatigue worsening with activity, significant cognitive/mood changes, or lack of energy despite rest, suggesting conditions like infection, autoimmune disease, heart problems, cancer, or mental health issues, warranting prompt medical evaluation.
Vitamin and mineral deficiencies, including B2, B3, B5, B6, B9, B12, C, D, iron, and magnesium, are among the most common causes of unexplained fatigue. Vitamin D deficiencies affect over 50% of the global population, and approximately 12.5% have iron deficiency anemia.
The four Ps are problem solving, planning, prioritising and pacing. The aim is to think of the four Ps at the beginning of each day or week to help you manage your energy levels.
Constant fatigue can sometimes indicate a wide range of underlying medical conditions — like iron deficiency, hypothyroidism, or diabetes. There are many ways you can reduce daily fatigue. Some examples include getting more sunshine and exercise, limiting caffeine, and eating balanced meals.
This level of fatigue goes beyond just feeling “tired” after a busy day. You may feel physically worn down, like your body is heavy and sluggish, while your mind continues to race. Even when you try to rest, the restlessness often associated with ADHD can make it hard to relax fully.
Most healthy adults should aim for 7 to 9 hours of sleep a night, though the exact amount depends on your age, activity level, and health status. It's important to stick to a consistent sleep schedule, going to sleep and waking up at the same time every day.
The koala is famous for sleeping around 20-22 hours a day, which is about 90% of the day, due to their low-energy diet of eucalyptus leaves that requires extensive digestion. Other extremely sleepy animals include the sloth (up to 20 hours) and the brown bat (around 20 hours), with some snakes like the ball python also sleeping up to 23 hours daily.
On average, Japanese sleep about 7 hours and 20 minutes a night, - the least among 33 OECD member countries. And the number of insomniacs is growing. But even as more people suffer from insomnia, help can be hard to find.
Symptoms
Vitamin B12 is the best vitamin supplement for treating tiredness and fatigue. This essential nutrient helps your body produce energy and keeps you feeling less fatigued both physically and mentally.
Fatigue red flags signal potentially serious issues beyond normal tiredness, including unexplained weight loss, persistent fever, night sweats, shortness of breath, chest pain, severe headaches, confusion, or new neurological/joint problems alongside exhaustion. Other signs include fatigue worsening with activity, significant cognitive/mood changes, or lack of energy despite rest, suggesting conditions like infection, autoimmune disease, heart problems, cancer, or mental health issues, warranting prompt medical evaluation.
You may also feel symptoms of sleep inertia if you didn't get enough hours of sleep. Everyone needs a certain number of sleep hours, and if you don't get what you need, you may find it difficult to hop out of bed feeling refreshed. Finally, sleep disorders could be the cause.
Burnout symptoms include emotional exhaustion, cynicism/detachment, and reduced effectiveness, manifesting as low energy, irritability, difficulty concentrating, sleep problems, and physical ailments like headaches or stomach issues. People often feel drained, overwhelmed, and detached from work or responsibilities, experiencing a lack of motivation, decreased performance, and increased negativity. It stems from prolonged stress and can impact work, personal life, and health, leading to symptoms like anxiety, depression, and substance misuse in severe cases.
The culprit often responsible for this unwelcome early morning awakening is cortisol, the “stress hormone.”
The "3-2-1 Bedroom Method" (or a variation like the 10-3-2-1 rule) is a sleep hygiene strategy to improve rest by staggering when you stop certain activities before bed: stop heavy food/alcohol 3 hours before, stop work/mental stress 2 hours before, and turn off screens (phones, TVs, computers) 1 hour before sleep, creating a better wind-down for your body.
Simply put, that means wake up at or around 5 a.m in the morning. Let's look at some examples of people that rise early: Benjamin Franklin planned his routine around waking up at 5 a.m. Apple CEO Tim Cook and Disney CEO Robert Iger both get up at 4:30 a.m.
Deficiency of vitamin D might be associated with diseases of immune dysregulation, one manifestation of which could be excessive daytime sleepiness (Zitterman and Gummert 2010; Hoeck and Pall 2011).
Fatigue becomes worrisome when it lasts over two weeks despite rest, significantly impacts daily activities, comes on suddenly without clear cause, or accompanies "red flag" symptoms like unexplained weight loss, shortness of breath, fever, severe pain, unusual bleeding, or heart issues, signaling a need for prompt medical attention for potential underlying conditions like anemia, diabetes, sleep apnea, thyroid problems, or infections.
Fatigue indicators to include: time of incident, number of days into shift pattern, number of hours into shift, number of rest days in previous 14 day period, rest in previous 24 hours, amount of sleep in previous 72 hours, work activity, commute time.