Fatigue that does not improve with rest is one of the most common reasons people seek specialist assessment. Many cases have a treatable hormonal or metabolic cause — including thyroid disorders, diabetes, adrenal conditions, and testosterone deficiency. Dr Kazmi, Consultant Endocrinologist, provides expert investigation at our Naas, Co. Kildare clinic.
Tiredness after exertion, illness, or poor sleep is normal. Medical fatigue is different — it is persistent, disproportionate to activity, and does not resolve with adequate rest.
You should consider a medical assessment if your fatigue:
Fatigue rarely occurs in isolation. These accompanying symptoms can help identify the underlying hormonal or metabolic cause:
Several hormonal and metabolic conditions are leading causes of unexplained fatigue. Many are highly treatable once properly diagnosed by a specialist.
Hypothyroidism is one of the most common causes of persistent fatigue. When the thyroid gland produces insufficient hormone, the body's metabolism slows — causing profound tiredness, weight gain, feeling cold, hair thinning and low mood. It is diagnosed by a blood test and is highly treatable.
Learn about thyroid disorders →Undiagnosed Type 2 diabetes or prediabetes is a frequently missed cause of fatigue. High blood glucose impairs the body's ability to use sugar for energy. Alongside tiredness, patients may notice excessive thirst, frequent urination and blurred vision. An HbA1c blood test is diagnostic.
Learn about diabetes →The adrenal glands produce cortisol, the body's essential stress hormone. When cortisol is deficient — due to Addison's disease, secondary adrenal insufficiency, or following steroid withdrawal — profound fatigue, weakness, dizziness and salt craving result. Specialist assessment and testing is essential.
Learn about adrenal disorders →In men, testosterone deficiency is a recognised and underdiagnosed cause of persistent fatigue, often accompanied by reduced libido, erectile dysfunction, low mood and reduced motivation. Many men with this condition go years without a diagnosis. Testosterone replacement therapy can substantially improve energy levels.
Learn about low testosterone →The pituitary gland controls multiple hormone systems. A pituitary tumour or hypopituitarism can cause fatigue through deficiencies in thyroid hormone, cortisol, growth hormone or sex hormones. Pituitary conditions require specialist endocrine evaluation and often MRI imaging.
Learn about pituitary disorders →Heart failure, arrhythmias and other cardiac conditions can cause significant fatigue, particularly when accompanied by breathlessness, palpitations or ankle swelling. Our Consultant Cardiologist Dr Kalyar provides specialist cardiac assessment including echocardiography and 24-hour ECG monitoring.
Learn about cardiac services →Identifying the cause of persistent fatigue requires a thorough clinical history, physical examination, and a targeted panel of blood tests. At Naas Cardiology & Endocrinology Clinic, Dr Kazmi takes a systematic approach to fatigue investigation.
A comprehensive fatigue panel typically includes:
At your initial consultation, Dr Kazmi will take a detailed history of your fatigue — its onset, duration, pattern and associated symptoms — along with a review of your medications and relevant medical history.
Blood tests are arranged at the visit. Results are reviewed at a follow-up consultation, where a diagnosis is established and a management plan discussed.
Where cardiac symptoms such as breathlessness or palpitations are present alongside fatigue, a cardiac assessment with Dr Kalyar can be arranged at the same clinic.
You do not need a GP referral to book a fatigue assessment. Self-pay appointments are available on Sundays at our Naas, Co. Kildare clinic. Initial consultation fee: €230.
Book a consultation with Dr Kazmi, Consultant Endocrinologist, at our Naas, Co. Kildare clinic. Thorough assessment of hormonal and metabolic causes of tiredness and low energy.