unexplained weight gain
Unexplained weight gain is a common clinical presentation that warrants a systematic evaluation of metabolic, endocrine, and lifestyle factors to identify any underlying physiological causes.
Possible causes
- 01
Hypothyroidism
commonAn underactive thyroid gland slows the body's metabolic rate, frequently leading to modest weight gain, fatigue, dry skin, and cold intolerance.
Evidence
- NICE CKS: Hypothyroidism (2023)
- 02
Polycystic Ovary Syndrome (PCOS)
commonHormonal imbalances and insulin resistance associated with PCOS commonly cause weight gain, particularly around the abdomen, alongside irregular periods.
Evidence
- NHS: Polycystic ovary syndrome overview (2022)
- 03
Fluid Retention (Oedema)
possibleRapid weight gain can be caused by fluid accumulation due to underlying heart, kidney, or liver dysfunction.
Evidence
- Mayo Clinic: Edema symptoms & causes (2023)
- 04
Cushing's Syndrome
less commonProlonged exposure to high levels of cortisol can cause rapid weight gain, particularly in the face, upper back, and abdomen.
Evidence
- NICE CKS: Cushing's syndrome (2022)
Recommended tests
Thyroid function panel
→TSH, Free T3, Free T4 — first-line test for fatigue, weight change, hair loss, mood.
Why: To evaluate thyroid hormone levels (TSH, FT4) and rule out primary hypothyroidism as a cause of metabolic slowing.
Guideline
- NICE CKS: Hypothyroidism - Scenario: Suspected hypothyroidism (2023)
HbA1c (diabetes)
→3-month average blood sugar — screens for prediabetes and diabetes.
Why: To screen for insulin resistance, prediabetes, or type 2 diabetes, which are frequently linked to unexplained weight gain.
GP consultation
→30–60 minute consultation with a British-trained GP — clinic, home or video.
Why: A comprehensive clinical assessment to review medication history, lifestyle factors, and guide targeted diagnostic investigations.
Guideline
- RCGP: Curriculum: Care of People with Metabolic Problems
When to worry
- Rapid, sudden weight gain (e.g., several pounds over a few days) accompanied by swelling in the legs, ankles, or abdomen.
- Shortness of breath, especially when lying flat or during mild exertion.
- Severe, persistent headaches, visual changes, or muscle weakness.
- Development of a rounded face (moon face), a fatty hump between the shoulders, or wide purple stretch marks on the skin.
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: Obesity: identification, assessment and management (CG189)
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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