- The concern is a pattern: looser clothes, repeatedly unfinished meals, reduced strength or measurable weight loss without trying.
- Dental pain, dry mouth, taste change, constipation, reflux, nausea, depression, loneliness, fatigue, breathlessness and difficulty shopping or cooking can reduce intake.
- Some medicines cause nausea, dry mouth, constipation, sleepiness or taste change.
Look for a trend, not one small meal
The concern is a pattern: looser clothes, repeatedly unfinished meals, reduced strength or measurable weight loss without trying. If possible, weigh under similar conditions every one or two weeks and note whether the change began after illness, hospitalisation, a medicine change or a major life event.
Ask what makes eating difficult
Dental pain, dry mouth, taste change, constipation, reflux, nausea, depression, loneliness, fatigue, breathlessness and difficulty shopping or cooking can reduce intake. Coughing or choking with food, a wet voice after swallowing or food feeling stuck deserves medical assessment.
Medicines can affect appetite
Some medicines cause nausea, dry mouth, constipation, sleepiness or taste change. Do not stop them independently. Bring the complete list to a doctor or pharmacist and explain when appetite or weight changed.
When portions shrink, nutrition matters more
Smaller frequent meals may be easier than large meals. Include protein and energy-dense nutritious foods that fit the person’s medical needs. People with diabetes, kidney disease, heart disease or swallowing problems may need tailored advice.
Frailty is about function too
Weight loss becomes more concerning when it comes with weaker grip, slower walking, difficulty standing from a chair, lower activity or exhaustion. Early medical, dietetic and functional assessment can identify reversible contributors.
Know the red flags
Persistent unplanned weight loss, difficulty swallowing, repeated vomiting, black or bloody stools, persistent diarrhoea, fever, night sweats, a new lump, marked breathlessness or rapidly declining strength require medical review.
Related reading and next steps
This page provides general health education, not an individual diagnosis or emergency plan. Persistent, severe, sudden or rapidly worsening symptoms require appropriate conventional medical assessment.