unexplained weight loss
Unexplained weight loss is a significant clinical symptom defined as losing more than 5% of body weight within 6 to 12 months without intentional dieting.
Possible causes
- 01
Hyperthyroidism
commonAn overactive thyroid gland accelerates the body's metabolic rate, leading to rapid weight loss despite a normal or increased appetite.
Evidence
- NICE CKS: Hyperthyroidism (2021)
- 02
Type 1 or Type 2 Diabetes
possibleInsulin deficiency or resistance prevents the body from absorbing glucose, forcing it to burn fat and muscle for energy.
Evidence
- Mayo Clinic: Diabetes Symptoms & Causes (2023)
- 03
Malabsorption or Gastrointestinal Disorders
possibleConditions like coeliac disease or inflammatory bowel disease impair nutrient absorption in the gut, leading to weight loss.
Evidence
- NICE: Coeliac disease recognition, assessment and management (NG20)
- 04
Occult Malignancy
less commonUnintentional weight loss can be an early systemic sign of underlying oncological processes requiring urgent investigation.
Evidence
- NICE: Suspected cancer: recognition and referral (NG12)
Recommended tests
Full body blood test
→80+ marker screen — CBC, thyroid, liver, kidney, iron, vitamin D, HbA1c, lipids, hormones.
Why: Provides a comprehensive baseline screen including blood counts, organ function, and metabolic markers to identify systemic causes.
Guideline
- NHS: Unexplained weight loss investigations (2023)
Thyroid function panel
→TSH, Free T3, Free T4 — first-line test for fatigue, weight change, hair loss, mood.
Why: Directly evaluates thyroid hormone levels to rule out hyperthyroidism as a primary metabolic driver of weight loss.
Guideline
- NICE CKS: Thyroid disease assessment (2021)
HbA1c (diabetes)
→3-month average blood sugar — screens for prediabetes and diabetes.
Why: Screens for undiagnosed diabetes by measuring average blood glucose levels over the past three months.
Guideline
- WHO: Use of Glycated Haemoglobin (HbA1c) in the Diagnosis of Diabetes Mellitus (2011)
GP consultation
→30–60 minute consultation with a British-trained GP — clinic, home or video.
Why: Essential for a detailed physical examination, history taking, and coordinating targeted diagnostic imaging or specialist referrals.
Guideline
- BMJ Best Practice: Assessment of unintentional weight loss (2023)
When to worry
- Severe abdominal pain, persistent nausea, or vomiting
- Change in bowel habits lasting more than 3 weeks, or blood in the stool
- Persistent fever, night sweats, or severe fatigue
- New, unexplained lumps, lymph node swelling, or difficulty swallowing
- Shortness of breath or chronic cough
Sources & guidelines
This triage is grounded in mainstream clinical guidance. Every case is reviewed in person by a British-trained GP before any diagnosis or prescription.
- NICE: Suspected cancer: recognition and referral (NG12)
- BMJ Best Practice: Unintentional weight loss evaluation guidelines
Related
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This page is educational triage information only. It is not a medical diagnosis and does not replace a consultation with a licensed doctor. Aafiyah Care Clinic — Unit G09, Churchill Executive Towers, Business Bay, Dubai. DHA-licensed.
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"Called at 8am with a fever, had a British-trained doctor at my door by 11. He sat with me for 45 minutes — not the 5 minutes I'm used to. Prescription delivered same day. Felt like having a proper GP again."
"We finally have one doctor who knows all of us. The kids actually like going. Follow-up calls happen without us chasing. Worth every dirham."
"The 40+ marker report came back with a real conversation, not a PDF dumped in my inbox. Caught a vitamin deficiency I'd been ignoring for years."
"After surgery I dreaded going back to a hospital for dressings. Their nurse came every other day, the doctor checked in by WhatsApp. Healed faster than I expected."
"Fell ill on day two of our trip. Doctor in the suite within 90 minutes, full assessment, prescription to the hotel pharmacy. Genuinely NHS-standard care in Dubai."
"My father refuses to leave the house. Aafiyah's team comes monthly, manages his medication, and treats him with such dignity. It changed everything for our family."
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