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Anaemia in teenage girls: what a low haemoglobin means and what to do | CION Cancer Clinics
If your teenage daughter's haemoglobin is below the normal band on her report, she has anaemia, and it is very common in India. The further below, the sooner she needs a doctor. Most cases come from low iron, driven by periods, growth, skipped meals and worms, and respond to treatment. Some are thalassaemia trait or sickle cell disease instead, where iron does not help. A proper blood test finds which. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- What counts as a low haemoglobin in a teenage girl?
- Why are teenage girls so often anaemic?
- What signs might a parent or teacher see?
- What should you do if a school test says her haemoglobin is low?
- What do families believe about anaemia in girls?
- What can food do, and what can this page not tell you?
- Common questions about anaemia in adolescent girls
The short answer
What counts as a low haemoglobin in a teenage girl?
If her haemoglobin is below the normal band printed on her report, she has anaemia, which simply means a low haemoglobin. The World Health Organization sets the cut-off for teenage girls, and labs print a band close to it. It is very common in India, and in most girls it is caused by a shortage of iron that can be found and treated.
What a low result does and does not mean
Haemoglobin is the part of the blood that carries oxygen. A value just under the line often causes few symptoms. A value far below the line is treated as severe and needs a doctor soon. Reference ranges differ a little between laboratories, and one result is always read alongside symptoms and a repeat test. A single school camp reading is a reason to check, not a diagnosis.
Why it matters at this age
A low haemoglobin can leave a girl tired, breathless on stairs and struggling to concentrate in class. It can hold back sports and schoolwork. Iron stores built in the teenage years also carry into adult life and any future pregnancy, so fixing it now helps later too.
Not every low haemoglobin is iron shortage. Thalassaemia trait, sickle cell disease and vitamin B12 shortage can look similar on a basic report and need different care.The causes
Why are teenage girls so often anaemic?
Usually it is more than one thing at once. Finding each one matters, because treating only the diet leaves the rest in place.
Periods
Every month some iron is lost. Heavy or long periods, which many girls think are normal, can drain iron faster than food puts it back.
Growth
The teenage growth spurt builds more blood and muscle, and both need iron. Needs rise at exactly the time many girls start eating less.
What is on the plate
Skipped breakfast, rice-heavy meals with little dal or greens, frequent fasting and dieting to stay slim all cut iron intake.
Also worth asking about
- Tea with meals
- Packaged snacks in place of lunch
Worms and infections
Intestinal worms feed on blood and are common where children walk barefoot or water is unsafe. Repeated infections also lower the count.
Inherited blood conditions
Thalassaemia trait and sickle cell disease are seen in several communities across Telangana and Andhra Pradesh, including some tribal areas. Iron will not correct these, and extra iron may do harm.
Not sure whether this applies to you?
Ask an oncologistWhat parents notice
What signs might a parent or teacher see?
- Tired all the time, or sleeping much more than before
- Pale inner eyelids, lips, palms or nails
- Breathless or heart racing on stairs or during games
- Headaches, dizziness or poor concentration in class
- Craving ice, raw rice, chalk or mud
- Brittle or spoon-shaped nails and hair falling more than usual
After a low result
What should you do if a school test says her haemoglobin is low?
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Get a proper blood test
School camps often use a finger-prick device. Ask a doctor for a complete blood count from a laboratory. It gives the haemoglobin, the size of the red cells and the other counts in one report.
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Let the doctor look for the cause
Depending on the first report, the doctor may add ferritin, which shows iron stores, a stool test for worms, or a test for thalassaemia trait. Tell the doctor honestly about heavy periods and any family history of blood disorders.
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Follow the treatment the doctor sets
Many girls need iron tablets as well as food changes. The doctor decides which, and for how long. Do not start, stop or change a medicine on your own, and do not give extra iron to a girl with thalassaemia trait.
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Use the government programme
Under Anaemia Mukt Bharat, schools and Anganwadi centres give a weekly iron and folic acid tablet and regular deworming. Ask the school or your ASHA worker whether your daughter is receiving them.
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Repeat the test
A repeat blood count, at the time the doctor suggests, shows whether treatment is working. If it has not risen, the cause needs a second look, sometimes by a haematologist.
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When it cannot wait
Take her to the nearest emergency department the same day, or call 108, if she faints, is breathless while resting, has chest pain, or is bleeding so heavily during her period that she soaks through pads very quickly and feels dizzy. The same applies if she looks yellow, passes dark urine or has unusual bruising along with the tiredness. Do not wait for a routine appointment.
Commonly believed
What do families believe about anaemia in girls?
"All girls are a little weak. It is normal."
Common is not the same as normal. Constant tiredness, breathlessness and falling marks are signs worth checking. Once the cause is treated, most girls notice a real difference in energy and concentration.
"Heavy periods are just how she is made."
Periods that last very long, need frequent pad changes or come with clots can drain iron faster than food can replace. They can also point to a bleeding disorder. Mention them to the doctor rather than accepting them.
"Iron tablets make girls fat."
Iron tablets do not cause weight gain. They can upset the stomach or darken stools, which is expected. If side effects are a problem, tell the doctor, who can suggest ways to make them easier. Do not simply stop.
"Beetroot and pomegranate juice will fix it."
These are healthy foods, but they carry less iron than people expect. Dal, greens, ragi, sajjalu, eggs, fish and meat do more, especially with a vitamin C food. A clearly low count usually needs treatment as well as diet.
Being straight with you
What can food do, and what can this page not tell you?
Food keeps iron stores up once they have been refilled, and it helps prevent anaemia coming back. On its own, it is slow to correct a haemoglobin that is already well below the line.
A practical plate for a teenager
Breakfast matters most, because it is the meal girls skip. Ragi dosa, pesarattu or an egg with a guava is a strong start. At lunch and dinner, add a leafy curry such as thotakura or palakura, a dal, and something sour like lemon or tomato. Keep tea and coffee away from meals. If your family eats meat, fish or eggs, small regular portions help a great deal.
What this page cannot tell you
It cannot tell you why your daughter's own haemoglobin is low, or whether she needs tablets, further tests or specialist review. A symptom list is not a diagnosis, and a normal-looking girl can still have a low count. Take the report to a doctor. If the count stays low despite treatment, or other counts are also abnormal, ask for a haematologist.
If a blood disorder runs in your family, mention it before marriage and before any pregnancy. Testing is simple and informative.Questions we are asked
Common questions about anaemia in adolescent girls
At what age should a girl have her haemoglobin checked?
There is no single age. A check is sensible once periods start, or earlier if she is tired, pale or struggling in class. School health camps under government programmes often screen girls. If a camp flags a low reading, follow it with a laboratory blood count rather than ignoring it.
Can anaemia affect her studies?
Yes. Low haemoglobin means less oxygen reaches the brain and muscles, which can show up as poor concentration, headaches and tiredness in the afternoon. Many parents notice marks and energy improve after treatment. It is not the only reason a child may struggle, so keep an open mind.
Are the free school iron tablets safe?
The weekly tablets given under Anaemia Mukt Bharat are part of a national programme and are generally well tolerated. Mild stomach upset and dark stools can happen. If your daughter has thalassaemia trait or another known blood condition, tell the school and ask her doctor before she takes them.
How do I know if it is thalassaemia trait and not iron shortage?
Both can show small red cells on a report. A doctor may order ferritin and a haemoglobin electrophoresis or HPLC test, which looks at the types of haemoglobin in the blood. Knowing the answer matters, because iron does not help the trait and may add iron where the body does not need it.
Her periods are very heavy. Is that connected?
Very likely. Heavy periods are one of the commonest reasons for iron shortage in girls. They can also be a sign of a bleeding disorder or a hormone imbalance. See a doctor, and a gynaecologist if needed, so the bleeding is treated as well as the anaemia it causes.
She is vegetarian. Can she still get enough iron?
Yes, with planning. Dal, rajma, chana, ulavalu, greens, sajjalu, ragi, nuvvulu and jaggery in small amounts all add iron. Pairing them with lemon, guava, amla or tomato helps absorption, and keeping tea away from meals helps too. Treatment may still be needed if the count is already low.
Can anaemia in a teenager be a sign of blood cancer?
Rarely. Most anaemia in girls is iron shortage. A doctor looks further if the white cells or platelets are also abnormal, if there is unexplained fever, bruising, bone pain or swollen glands, or if the count does not respond to treatment. Those signs need a prompt review, not panic.
When should we see a haematologist?
Ask for one if the haemoglobin stays low despite treatment, other blood counts are abnormal, or a family blood disorder is suspected. At CION, Dr. Basudev Pokhrel and the haematology team review the report, arrange the tests needed to find the cause, and explain the plan to the family.
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Sources
- World Health Organization — Anaemia fact sheet
- World Health Organization — Guideline on haemoglobin cutoffs to define anaemia in individuals and populations
- Ministry of Health and Family Welfare, Government of India — Anaemia Mukt Bharat
- NHS — Iron deficiency anaemia
- NHLBI — Anemia
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
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Diet for Anaemia: What Actually WorksBuilding a plate that keeps iron stores upMillets and Iron in a Telugu DietUsing ragi and sajjalu the right wayVitamin C and Iron AbsorptionWhy a guava after lunch helpsAnaemia and Exercise PerformanceFor girls who play sport and tire easilyNutritional and Lifestyle HaematologyEvery page on food, habits and blood counts
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