General
Excessive hunger
A persistent or unusually strong urge to eat that is out of keeping with your normal appetite — which can be a harmless response to activity or stress, but can also signal an overactive thyroid, diabetes or a low blood sugar that needs prompt attention.
Education and reference only. This explains the common causes of excessive hunger and the warning signs that need urgent help, in plain language — it is not a diagnosis or a substitute for advice from a clinician. If you feel very unwell or are worried, seek medical help.
Quick answer
What is excessive hunger?
It is normal for appetite to rise with exercise, growth, pregnancy or simply not eating enough, but a marked and persistent increase in hunger that is out of keeping with usual eating can occasionally point to an underlying problem. An overactive thyroid speeds up the metabolism, so people may feel constantly hungry yet lose weight.
- Get urgent help: Seek urgent same-day help for extreme hunger with increased thirst, frequent urination, tiredness and weight loss, especially in a child — this can be new diabetes. Treat sudden hunger with sweating, shaking, trembling, confusion or weakness as a possible low blood sugar — have a sugary drink or snack and seek help if it does not settle.
- Self-care: If your hunger has been checked and no medical cause has been found, regular balanced meals built around higher-fibre and protein-containing foods help you feel fuller for longer than sugary snacks, which spike and then crash blood sugar and leave you hungry again.
About excessive hunger
It is normal for appetite to rise with exercise, growth, pregnancy or simply not eating enough, but a marked and persistent increase in hunger that is out of keeping with usual eating can occasionally point to an underlying problem. An overactive thyroid speeds up the metabolism, so people may feel constantly hungry yet lose weight. In diabetes, especially when newly developing, the body cannot use sugar properly, leaving cells effectively starved, which drives hunger alongside increased thirst, frequent urination, tiredness and weight loss — a picture that needs prompt assessment, particularly in a child or young person. Emotional factors such as stress and anxiety can drive eating, and recurrent episodes of eating large amounts with a sense of loss of control may reflect an eating disorder. A sudden surge of hunger with sweating, shaking, trembling or confusion is different again, and suggests a low blood sugar that needs treating quickly.
When to get help
Call 999 or go to A&E if excessive hunger comes with any of these warning signs:
- Seek urgent same-day help for extreme hunger with increased thirst, frequent urination, tiredness and weight loss, especially in a child — this can be new diabetes.
- Treat sudden hunger with sweating, shaking, trembling, confusion or weakness as a possible low blood sugar — have a sugary drink or snack and seek help if it does not settle.
- Call 999 if someone with diabetes becomes drowsy, confused or unconscious, which can mean a dangerously low or high blood sugar.
- Seek urgent help for excessive hunger with rapid weight loss, a racing heartbeat and feeling hot and restless.
- Seek help if increased appetite goes with vomiting, abdominal pain and deep, rapid breathing, which can signal a serious diabetes complication.
When to see a doctor
Seek urgent same-day help if increased hunger comes with thirst, frequent urination, tiredness and weight loss, as this can mean diabetes — and call 999 if a person with diabetes becomes drowsy or confused. Treat sudden hunger with sweating, shaking and confusion as a possible low blood sugar needing quick action. For a persistent rise in appetite without these warning features, or hunger linked to mood, stress or a sense of loss of control over eating, book a routine appointment so the cause can be looked into and support arranged.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
What can cause it
Common causes of excessive hunger
Excessive hunger has many possible causes. Each links to a full, plain-language guide to that condition — what it is, how it's treated and when to seek help.
What helps
Self-care and what you can do
If your hunger has been checked and no medical cause has been found, regular balanced meals built around higher-fibre and protein-containing foods help you feel fuller for longer than sugary snacks, which spike and then crash blood sugar and leave you hungry again. Staying well hydrated, getting enough sleep and managing stress all reduce appetite that is driven by tiredness or emotion rather than true need. Eating mindfully — slowing down, noticing fullness and limiting distractions such as screens at mealtimes — helps the brain register when you have eaten enough. If you notice that hunger is tied to low mood, stress or a sense of losing control over eating, speaking to a clinician about support is worthwhile rather than struggling alone.
Answers
Excessive hunger: frequently asked questions
Can constant hunger be a sign of diabetes?
Yes. In diabetes the body cannot use sugar properly, so cells are effectively starved and hunger rises, often with increased thirst, frequent urination, tiredness and weight loss. This combination, especially in a child, needs prompt assessment.
Why am I hungry even though I am losing weight?
Feeling hungry while losing weight can point to an overactive thyroid speeding up your metabolism, or to diabetes. Both should be checked by a clinician rather than assumed to be normal.
What should I do if hunger comes with shaking and sweating?
Sudden hunger with sweating, shaking, trembling or confusion can mean a low blood sugar. Have a sugary drink or snack straight away, and seek help if it does not quickly settle or keeps happening.
Is it normal for appetite to increase sometimes?
Yes. Appetite naturally rises with exercise, growth, pregnancy, poor sleep or simply not eating enough. A persistent, marked increase that is out of keeping with your normal eating, or that comes with other symptoms, is what deserves a check.
Sources
Where this is drawn from
- NICE CKS: Diabetes - suspected.
- Diabetes UK: signs and symptoms.
Related symptoms
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