Hematologist
CION Cancer Clinics
Acute chest syndrome: the sickle cell emergency in the lungs | CION Cancer Clinics
Acute chest syndrome is a lung emergency in sickle cell disease. If the person has new chest pain, fast breathing, a cough with fever or blue lips, call 108 or go to the nearest emergency department now. Sickled cells block blood vessels in the lungs, and oxygen can fall within hours. This page explains the signs, what hospital care involves and what may lower the chance of another episode. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
BP
Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What is acute chest syndrome?
- What are the signs, in adults and in children?
- Is it a pain crisis or acute chest syndrome?
- What will the hospital team do?
- What do families often get wrong about chest syndrome?
- Can another episode be prevented, and what can this page not tell you?
- Common questions about acute chest syndrome
!
If you are reading this during an episode, act first
A person with sickle cell disease who has new chest pain, fast or hard breathing, a cough with fever, or lips that look blue or grey needs hospital today. Call 108 or go to the nearest emergency department now. Say clearly that the person has sickle cell disease and bring any haematology card or recent reports. Do not wait to see if it settles by morning, and do not treat it at home as an ordinary cold or pain crisis.
The short answer
What is acute chest syndrome?
Acute chest syndrome is a lung emergency in sickle cell disease. Sickled red cells block small blood vessels in the lungs, part of the lung stops taking in air properly, and oxygen in the blood falls. It can get worse within hours, which is why it is treated in hospital.
Why it is so serious
Low oxygen makes more red cells sickle. More sickling blocks more vessels. That circle can turn a mild cough into serious breathing trouble quickly, in children and adults alike. It is one of the most common reasons people with sickle cell disease need intensive care.
What usually sets it off
Often it follows a chest infection, including an ordinary virus. It can also start during a pain crisis, especially when pain in the ribs or back makes a person breathe shallowly. It sometimes appears a day or two after surgery or after strong pain medicines. In many cases doctors never find one clear cause.
Doctors use the word "syndrome" because it is a pattern of findings rather than one single disease. The name does not make it any less urgent.Not sure whether this applies to you?
Ask an oncologistWhat to watch for
What are the signs, in adults and in children?
Any one of these in a person with sickle cell disease is a reason to go to hospital. You do not need all of them.
Breathing changes
Breathing faster than usual, struggling for breath, or needing to sit up to breathe. In a small child, look for the ribs pulling in with each breath or the nostrils flaring.
Chest, rib or back pain
New pain in the chest or pain that makes a deep breath hard. A pain crisis in the ribs or upper back deserves a closer watch, because this is where chest syndrome often begins.
Fever and cough
A fever with a cough can look like a simple chest cold. In sickle cell disease it should be checked the same day.
Also worth reporting
- Wheezing that is new
- Coughing up blood-streaked mucus
Low-oxygen signs
Lips or fingertips that look blue or grey, unusual sleepiness, confusion, or a child who will not feed or play. These mean the body is short of oxygen and need emergency care at once.
Side by side
Is it a pain crisis or acute chest syndrome?
More like a usual pain crisis
Think of acute chest syndrome
Pain in the arms, legs or lower back
Pain in the chest or ribs, worse on breathing in
Breathing is normal between waves of pain
Breathing is fast, shallow or laboured all the time
No cough and no fever
Cough, fever or new wheeze
Colour of lips and nails looks normal
Lips or fingertips look blue or grey
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
At the hospital
What will the hospital team do?
-
Oxygen check and oxygen
A small clip on the finger measures oxygen in the blood. If it is low, oxygen is given through a mask or small tubes in the nose straight away, before every test result is back.
-
Chest X-ray and blood tests
A new shadow on the X-ray, together with the symptoms, confirms the diagnosis. Blood tests check haemoglobin, signs of infection and how the kidneys and liver are coping.
-
Antibiotics and pain relief
Antibiotics are usually started because infection is so often involved. Pain is treated properly, so the person can breathe deeply. Fluids are given with care, since too much can also strain the lungs.
-
Breathing exercises
Nurses may give a simple breathing device to blow into, and ask for regular deep breaths while awake. This helps keep the lungs open.
-
Blood transfusion, if needed
If oxygen stays low or haemoglobin drops, the team may give a transfusion. Some people need an exchange transfusion, where sickled blood is removed as fresh blood goes in. The team decides this.
Commonly believed
What do families often get wrong about chest syndrome?
"It is only a cough. We will see the doctor after a few days."
In sickle cell disease a cough with fever or fast breathing can become serious within hours. Same-day assessment is the safe choice, even if it turns out to be a simple cold.
"The X-ray was clear, so it cannot be chest syndrome."
Early on, the X-ray can look normal and the shadow appears a day later. Hospitals often repeat it if symptoms get worse. A clear first picture does not mean you can relax the watch.
"Once a person has had it, they are protected next time."
It works the other way. A person who has had acute chest syndrome once is more likely to have it again. That is why the haematologist often discusses longer-term treatment after the first episode.
"Strong pain medicine is dangerous, so it is better to bear the pain."
Untreated chest or rib pain makes people breathe shallowly, and shallow breathing lets parts of the lung collapse. Pain relief chosen and watched by the hospital team is part of treating the chest, not a risk to avoid.
After the episode
Can another episode be prevented, and what can this page not tell you?
The chance of another episode can often be lowered, though not taken away. The plan depends on the person, so it is set by the treating haematologist rather than by a page like this one.
What the haematologist may discuss
After one episode, many teams discuss hydroxyurea, a daily medicine that makes red cells less likely to sickle. Some people are offered regular transfusions instead. Keeping vaccines up to date and treating chest infections early also help. Before any planned operation, tell the surgeon and the anaesthetist about sickle cell disease, as extra preparation lowers the risk afterwards. Never start, stop or change a medicine or transfusion plan on your own.
What you can do at home
During a pain crisis, take slow deep breaths often, and sit up rather than lying flat all day. Drink water regularly. Watch breathing closely whenever there is a cold or fever.
What this page cannot tell you
It cannot tell you whether a particular cough is chest syndrome, or how severe an episode will be. Only an examination, an oxygen reading and tests can do that. If you are unsure, go and be checked.
CION's haematology team can review the discharge summary with you after an episode and help plan follow-up with the right specialists.Questions we are asked
Common questions about acute chest syndrome
Should I call 108 or take the person to hospital myself?
If the person is struggling to breathe, looks blue or grey, is confused or very drowsy, call 108. If breathing is only a little faster and they are alert, going straight to the nearest emergency department by car or auto is reasonable. Either way, go now, and tell staff at the desk that the person has sickle cell disease.
Can acute chest syndrome happen in young children?
Yes. It is common in children, where it often starts with fever and cough and can look like an ordinary chest infection. Small children may not complain of chest pain. Watch for fast breathing, ribs pulling in, poor feeding or unusual sleepiness, and take the child to hospital the same day.
How long does a person stay in hospital?
It varies a great deal. A mild episode caught early may need a short stay, while a severe one can need intensive care and a longer admission. The team watches oxygen, breathing and blood tests, and discharge happens once breathing is settled without extra oxygen. Ask the ward team what they are waiting to see.
Is acute chest syndrome the same as pneumonia?
Not exactly. Pneumonia is a lung infection. Acute chest syndrome can be triggered by an infection, but it also involves sickled cells blocking blood vessels in the lung, and sometimes no infection is found at all. That is why it is treated as its own emergency, with oxygen, pain relief and sometimes transfusion as well as antibiotics.
Why did it start after an operation?
After surgery, pain and pain medicines can make breathing shallow, and people move less. Both let parts of the lung close down, which encourages sickling. This is why sickle cell disease must be mentioned before any planned operation. The surgical and haematology teams can plan preparation and breathing care in advance.
Will there be lasting lung damage?
Many people recover their breathing fully after an episode. Repeated episodes, however, can leave scarring and raise the risk of long-term lung and blood pressure problems in the lungs. Your haematologist may suggest follow-up breathing tests or a heart scan. Ask what checks make sense for your own situation.
Does a blood transfusion always help?
A transfusion can quickly improve oxygen delivery when an episode is moderate or severe, but it is not needed in every case and it carries its own risks. The team weighs oxygen levels, haemoglobin and how fast things are changing. Do not ask for or refuse a transfusion without talking it through with them first.
Can CION help after we are discharged?
Yes. CION's haematology team can go through the discharge summary with you, explain the tests that were done, and discuss longer-term options with the family. Where specialised care is needed, the team helps coordinate it with qualified centres. Bring every report from the admission to the appointment.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Patient stories
Hear it from people we have treated
Every story is a video, in the patient's own words. Nothing here is a written testimonial.
Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. A haematology consultation can be booked at any of these centres through one helpline, and your team will tell you where each test or treatment takes place.
Warangal
Vizag
Sources
- NHS — Sickle cell disease
- National Heart, Lung, and Blood Institute — Sickle Cell Disease
- American Society of Hematology — Sickle Cell Disease
- National Health Mission — National Sickle Cell Elimination Mission
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
Related pages
When a Sickle Cell Crisis Needs HospitalThe other emergency signs that should not waitPain Crisis: What Triggers It and What HelpsHow a rib or back pain crisis can lead into the chestHydroxyurea in Sickle Cell DiseaseA medicine often discussed after a first episodeTransfusion in Sickle Cell: When and WhyWhy the team may give blood during an episodeSickle Cell DiseaseThe full guide for families
Talk to us
Home from hospital and unsure what comes next?
Tell us what happened and bring the discharge summary. CION's haematology team will go through it with you and help plan follow-up. One helpline serves every CION centre.