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The SS form is the most common and often the most severe. The SC form generally brings fewer crises, with particular attention to the eyes and hips.

The S beta-thalassaemia forms resemble the SS form when normal haemoglobin production is absent (Sβ0) and remain milder when it partly persists (Sβ+). Each person lives their form differently, and follow-up adapts to their history rather than to the label.

A vaso-occlusive crisis occurs when sickled red blood cells block circulation in a bone, a joint, the belly or the back, causing intense pain. The most frequent triggers are dehydration, cold, altitude, intense effort, fever and infections, stress, lack of sleep, alcohol and tobacco.

Spotting your own triggers, day after day, is one of the most effective ways to space out crises. That is exactly what Trévor's daily check-in helps you do.

At the first signs, drink water regularly, keep warm, rest and take the painkillers planned with your doctor, at the planned times. Slow breathing, four seconds in and six seconds out for five minutes, helps release tension.

If the pain stays strong after a few hours despite this plan, or if a warning sign appears, the next step is the hospital. Trévor's care card summarises your plan for the team receiving you.

Some signs require the hospital without delay. A fever of 38.3 °C or higher (or 38 °C tympanic, twice an hour apart).

Chest pain, cough or shortness of breath. Weakness on one side of the body, trouble speaking or a sudden severe headache.

A painful erection lasting more than two hours. In a child, sudden pallor with a swelling belly.

Pain that your usual plan leaves untouched. In Geneva and Switzerland, 144 sends an ambulance; in France, 15.

Saying "I have sickle cell disease" on arrival speeds up care, and Trévor's care card says it for you.

Acute chest syndrome is a lung complication combining fever, chest pain, cough and shortness of breath, often in the days following a crisis. It is an emergency treated in hospital, with oxygen, antibiotics and sometimes transfusion.

During a crisis, breathing deeply every hour, if needed with a small device called an incentive spirometer, drinking enough and moving as soon as possible reduce the risk of it appearing.

The most widely used background treatment is hydroxyurea, a daily tablet that spaces out crises. Transfusions and exchange transfusions protect in high-risk situations and prevent certain complications, such as stroke in children.

Other targeted drugs exist or are under study depending on the country. Bone marrow transplantation and, since late 2023 in several countries, gene therapies aim at a cure, with access still limited to severe forms.

The choice is made with the haematologist, according to your history.

Hydroxyurea, also called hydroxycarbamide, increases the production of fetal haemoglobin, a haemoglobin that keeps red blood cells from deforming. Taken every day, it reduces the number of crises, acute chest syndromes and transfusions, and improves survival.

It requires regular blood tests to adjust the dose, and contraception is discussed during treatment. Long-term studies confirm its safety in children and adults alike.

A specialist consultation at least once a year, with a blood test, forms the foundation. Regular screenings are added, an eye exam, a check of the kidneys, heart and lungs, and in children a yearly transcranial Doppler to prevent stroke.

Vaccinations, particularly against pneumococcus, meningococcus and flu, protect a spleen that works poorly. In Geneva, this follow-up takes place at the HUG haematology department for adults and in paediatrics for children; in French-speaking Switzerland, at the CHUV in Lausanne.

Yes, in certain situations. Bone marrow transplantation from a compatible brother or sister cures more than nine children out of ten, with risks that justify reserving it for severe forms.

Gene therapies, which modify the person's own stem cells, have been authorised in several countries since late 2023 and are subject to gradual, supervised access. For the vast majority of people, life with the disease is organised around a background treatment, regular follow-up and solid self-management.

An adult aims for two to three litres of water a day, more in heat, effort or fever, unless the doctor sets a restriction. A bottle always within reach makes it simple.

On the plate, regular and varied meals, rich in fruit, vegetables and pulses, cover the increased needs for energy and folate, often supplemented by a folic acid prescription. Alcohol dehydrates and triggers crises; tobacco damages lungs that are already exposed.

Regular, moderate physical activity does good, with a warm-up, water within reach and breaks before exhaustion. Extreme efforts and breath-hold sports are discussed with the doctor. On a plane, the cabin is equivalent to an altitude of 1,800 to 2,400 metres.

Drinking about 250 ml of water per flight hour, getting up and walking every hour, wearing compression stockings on flights over four hours, covering up against the cabin cold and keeping painkillers in your hand luggage form the basis. For severe forms, a history of acute chest syndrome or a low oxygen saturation, the doctor prescribes supplemental oxygen, supplied by the airline on request to its medical service or through a personal portable oxygen concentrator accepted with a medical form.

For the same situations, the haematologist may propose an exchange transfusion before departure or, failing that, a simple transfusion, which lowers the share of haemoglobin S. A flight is postponed during a crisis or a fever.

Above 1,500 metres in the mountains, caution is required. Before a long trip, the HUG travel clinic checks vaccines, malaria prevention and prepares a medical letter.

At school, in Geneva, the individual support plan (PAI) is requested from the Child and Youth Health Service (SSEJ) with the treating doctor; it sets access to water, toilets, rest and the steps to follow during a crisis. In other French-speaking cantons, the request goes through the school nurse.

At work, adjustments are negotiated with the employer, and disability insurance (AI) steps in when the disease limits work capacity, with training measures, pensions or a helplessness allowance. In France, the PAI is requested from the school doctor and the MDPH opens rights.

A pregnancy is possible and needs preparation. Follow-up starts from the beginning, jointly by the haematologist and the obstetrician, because the risks of crisis, anaemia and complications are higher.

Some treatments, including hydroxyurea, are stopped before conception, which makes planning valuable. For contraception, progestin-only methods and the IUD are often preferred; the choice is made with the doctor. In Geneva, the HUG maternity works in direct contact with haematology.

In Geneva, the HUG haematology department follows adults and the paediatrics department follows children; the Association Suisse Drépano brings together people concerned, organises meetings and defends their rights. In French-speaking Switzerland, the CHUV in Lausanne plays the same reference centre role.

For an emergency, 144. For a question at any hour, Trévor answers on Telegram, with its sources, and refers you to the care team as soon as a warning sign appears.

Wetting the bed at night, enuresis, affects more than one in two children living with sickle cell disease. It is not misbehaviour or a delay, but an involuntary physical symptom.

The kidneys lose early on their ability to concentrate urine. At night the body passes a lot of water and the bladder fills very quickly.

Good news, it usually eases and stops on its own with age. Never punish the child, it is not their fault.

Several simple steps really help. • Drink plenty during the day, never restricting water, as restriction risks a crisis. • Ease off drinks in the two hours before bedtime, once the child is well hydrated. • In the evening, avoid chocolate, sodas, tea and sugary drinks, which irritate the bladder. • A timed night waking to go to the toilet, or a bedwetting alarm for older children. The care team also checks for a urinary infection or constipation, which make things worse.

Desmopressin, useful in ordinary enuresis, works poorly here. Talk to your centre, solutions exist for every age.

Yes. Difficulties with attention, memory and organisation are more frequent, linked to anaemia, low oxygen and silent cerebral infarcts, small strokes with no visible symptom.

This is not laziness. What helps, a neuropsychological assessment, school adjustments such as extra time and short instructions, and treating anaemia and sleep.

MRI screening is part of follow-up. Raising it early makes a difference.

Yes. Autism is not caused by sickle cell disease, it coexists with it as in the rest of the population.

This double specificity is little recognised. It changes care, because pain may be expressed differently and sensory sensitivities make hospital hard.

What helps, communicate clearly, announce each step, allow time, reduce stimulation and respect routines. Recognising neurodivergence reduces stigma.

The person remains the best expert on how they work.

The fatigue of sickle cell disease is real, linked to chronic anaemia and to crises. Learning to dose your energy is called pacing.

A few markers. • Alternate activity and rest, without waiting for exhaustion. • Break big tasks into short steps. • Protect your sleep, your hydration and keep warm. Gentle, regular activity stays beneficial.

You aim for the right dose, between stillness and overexertion.

Stress, physical or emotional, is among the factors that can favour a crisis, alongside cold, dehydration and fatigue. Acting on stress therefore also protects your body. • Breathe slowly and take regular breaks. • Look after your sleep and your moments of rest. • Lean on those close to you and on Trévor's toolbox for hard moments.

Easing the tension acts on a trigger you can influence.

Yes, sleep problems are common and often played down. Sleep apnoea is more frequent, especially in children, and the drop in oxygen at night can trigger crises.

Pain and anxiety also break up sleep. Loud snoring, breathing pauses, daytime sleepiness or morning headaches warrant an ENT opinion and sometimes a sleep study.

What helps, treat the cause, keep regular hours, a cool dark room, screens off before bed. Sleeping badly is not a lack of willpower.

Fatigue is a common physical symptom, not laziness. It comes from chronic anaemia, inflammation, poor sleep, pain and sometimes mood.

What helps, pacing, budgeting your energy and alternating effort and rest, good sleep, gentle regular activity, good hydration. Treating reversible causes matters just as much, anaemia, sleep, iron, mood, with your team.

Fatigue that worsens quickly, new breathlessness or unusual paleness deserve prompt advice.

Several treatments reduce crises and protect the organs. • Hydroxyurea (hydroxycarbamide) is the most common disease-modifying treatment. It raises fetal haemoglobin and spaces out crises. • Transfusions and exchange transfusions treat and prevent some complications, such as stroke risk. • Newer molecules exist, and their availability varies by country.

Your haematologist chooses with you the treatment suited to your form of the disease.

Two routes aim for a cure, reserved for severe forms and decided in a specialist centre. • Stem cell transplantation from a matched donor (often a brother or sister) is the best-established curative option, especially in children and young adults. • Gene therapy modifies your own cells so they make healthy haemoglobin. Two treatments were approved in 2023 and 2024 in the United States, the United Kingdom and Europe (Casgevy and Lyfgenia), for severe forms from age twelve.

These approaches are heavy, and still hard to access worldwide, even where they are approved. Your haematology centre assesses with you whether they make sense and are available in your situation.

The choice depends on the severity of your disease, on organ involvement, on your life plans and on your preferences. Availability in Switzerland is evolving, and each option has its benefits and constraints.

Prepare your questions and discuss them with your haematologist, who knows the treatments available in your centre. You can note your questions in Trévor and bring them to your next appointment.