Fatigue: causes, symptoms and treatment

If ignored, fatigue can reach alarming levels. Discover the warning signs and how to treat this condition.

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  • General and Family Medicine

Did you know that 7 in 10 people in Portugal show symptoms of burnout, an extreme form of fatigue? If this scenario sounds familiar, then this article is for you. Find out the causes and symptoms of fatigue, and what you can do to break this vicious circle and get your quality of life back.

 

Fatigue: what is it?

Fatigue is the body and mind’s natural response to prolonged exertion, overload or lack of balance. It is a sign that a person’s energy reserves – physical, mental or emotional – are exhausted or close to it. More than a simple sign of tiredness, fatigue is a warning that something needs to be adjusted, whether it’s the pace of life, priorities or the expectations we place on ourselves.

This state can be temporary, such as after a highly active day, or it can become constant fatigue when the body gets used to functioning at chronic exhaustion. And this condition should not be ignored: accumulated fatigue decreases wellbeing, affects productivity and compromises physical and mental health.

What are the types of fatigue?

Fatigue can occur at different levels, depending on the origin of the exertion or strain.

  • 1. Physical fatigue

  • 2. Mental fatigue

  • 3. Emotional fatigue

  • 4. Social fatigue

  • 5. Existential fatigue

What are the symptoms of fatigue?

Each person experiences fatigue differently, but there are signs to help identify this condition, whether physical, mental or emotional. It’s important to understand that the onset of these symptoms is not isolated: they often combine and create a larger impact in daily life.

Physical symptoms

When fatigue sets in, these are the most common physical signs.
Muscle fatigue: A constant feeling of heavy limbs, weakness or difficulty performing simple physical tasks.
Drowsiness: Difficulty staying awake or focused because the body demands rest.
Lack of energy: Fatigue persists even after sleeping or resting.
Physical tension: Muscle pain or stiffness in the shoulders, back and neck, as if in a constant state of alertness.
Changes in appetite: From constant hunger to a total loss of appetite, the body can react to fatigue in opposite ways.

Mental symptoms

The mind has its own way of showing that it has reached its limit.
Difficulty concentrating: The mind feels foggy and even the simplest tasks require a disproportionate effort.
Forgetfulness: Forgetting commitments or requiring major effort to remember things that would normally be automatic.
Difficult decisions: Thinking becomes slow and decision-making feels impossible.
Feeling overwhelmed: Everything seems more complicated than it really is, as though the mind has run out of space.

Emotional symptoms

When emotional exhaustion occurs, these are the principal symptoms.
Irritability: Minor situations that would normally be ignored become unbearable.
Discouragement: There is no energy to complete tasks or start new ones.
Anxiety or sadness: Emotional fatigue can magnify negative feelings, creating a cycle that is hard to break.
Apathy: Feeling like nothing matters, even things that would usually be cause for excitement.

Behavioural symptoms

Choices and routines ultimately reveal the impact of fatigue on everyday life. 
Sleep problems: The person may sleep more hours than usual but still wake up feeling tired, or have difficulty falling asleep or staying asleep during the night, even though they are exhausted.
Social isolation: Interaction with other people is avoided. People prefer to be alone. 
Procrastination: A desire to postpone everything reflects difficulty in mobilising the energy needed to act.
Frequent mistakes: Fatigue compromises efficiency, which increases the likelihood of making mistakes, even in regular tasks.

If ignored, fatigue can develop into more serious conditions, such as physical and emotional exhaustion, burnout syndrome, or deeper health problems, like depression, high blood pressure or other cardiovascular disorders.

Recognising the symptoms of extreme fatigue and acting early – either by adjusting the pace of life, resting or seeking professional help – is essential to prevent serious consequences. 

Can fatigue be diagnosed?

Although fatigue itself is not a disease, diagnosis paves the way for recovery strategies and prevents the condition from developing into illness.

  • 1. Analysing the medical history

  • 2. Evaluating symptoms

  • 3. Excluding medical causes

  • 4. Lifestyle and daily habits

  • 5. Psychological evaluation

How is fatigue treated?

Treatment for fatigue depends on the underlying cause, which may be a result of multiple factors – from medical problems to emotional issues or unhealthy habits. The specialist may recommend:

Specific medication to treat underlying conditions, such as anaemia, hormonal disorders or infections, which may be contributing to fatigue;
Psychological therapy to address the emotional or psychological causes, like stress, anxiety or burnout;
Adjustments in sleep habits, providing guidance on sleep hygiene and, in the case of disorders, specific sleep apnoea treatment or insomnia medication;
Dietary changes, with the help of a nutritionist, to guarantee a balanced diet that is rich in essential nutrients, helps fight fatigue and increases energy levels;
Physical exercise adapted to the patient’s condition, recommended by an expert, to improve circulation and increase energy levels, through activities like walking, yoga or moderate strength workouts;
Nutritional supplements, such as iron, vitamins or minerals, in case of deficiencies that may be causing fatigue;
Additional exams to research possible medical conditions that require continuous care;
Stress management counselling, which can include practices like mediation or mindfulness, guided by professionals in the field;
Recommendations on how to structure work and rest, to avoid mental and physical overload, possibly including relaxation techniques or occupational therapy.

It is important to remember that fatigue does not disappear with quick fixes or generic solutions, particularly extreme fatigue. The right treatment requires a personalised approach that combines changes in routine, medical care and strategies in the short, medium and long term, to fully restore balance.

 

Joaquim Chaves Saúde, by your side to treat fatigue

If you are feeling persistent fatigue that affects your everyday life, it is crucial to identify the causes and act preventively and effectively. At Joaquim Chaves Saúde, you can count on a personalised approach, specific exams, specialised medical care and strategies adapted to your lifestyle.

Don’t let fatigue define your life. Schedule a consultation in General Practice and Family Medicine, and get your wellbeing back with the help of professionals who are dedicated to your health and quality of life. Whenever necessary, our General Practice and Family Medicine professionals will refer you to the right specialty.

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Patrícia Maia
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Patrícia Maia
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General and Family Medicine
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Global And Integral Vision, In The Bio-Psycho-Socio-Cultural Context, Promotion Of Health And Healthy Lifestyles, Women's, Children's, Adults' And Elderly People's Health, Scheduled And Emergency Consultations Of The Day, Cardiovascular Risk Assessment, Application Of Screenings According To Age, Family History And Person, Driving Licence Certificates
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Mónica Santos Pereira
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General and Family Medicine
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Child and Adolescent, Women's, Adult and Elderly Health, Acute/Chronic Illness , Cancer Screening , Minor Surgery
Healthcare Units
Clínica de Sintra, Clínica de Cascais
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Medic
João Carlos Ramos
Speciality/Service
General and Family Medicine
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Preventive Medicine, Acute Health, Children, Geriatrics, Travel Medicine, Integrated Medicine in the Humanisation of Primary Health Care
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Clínica Cirúrgica de Carcavelos

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