Medically reviewed by Dr. Ponlawat Pitsuwan, Physician, Takecare Clinic Phuket. Last reviewed: September 2026.
Every rainy season I look after patients with dengue, and the part I watch most closely is when the fever starts to fall. That is often when warning signs appear, so I arrange daily checks and blood counts even if the patient is starting to feel a little better.
Once dengue is confirmed, the most common thing we hear from visitors is relief that they finally know what is wrong, followed quickly by a question about their flight home. The illness is usually self-limiting, and most people recover fully with careful care at their hotel or villa. The difficulty is that dengue follows a pattern that can mislead: the high fever of the first days often breaks just as the risk of complications peaks. Our role is to walk you through those days with a clear plan, regular blood counts and honest advice about when a clinic visit is enough and when hospital is the right place.
How dengue unfolds, day by day
Dengue is a viral infection spread by Aedes mosquitoes. It usually starts 4 to 10 days after the infecting bite with a sudden fever, often 39 to 40°C, a headache behind the eyes, intense muscle and joint pain, nausea and flushed skin. The World Health Organization describes three phases, and knowing which one you are in shapes everything we do.
| Phase | Usual timing | What you may notice | What we watch |
|---|---|---|---|
| Febrile | First 2 to 7 days | High fever, body aches, headache, poor appetite, sometimes a faint rash | Hydration, white cell count, platelets |
| Critical | Around days 3 to 7, as the fever falls, lasting 24 to 48 hours | You may feel better or worse; this is when warning signs appear | Platelets, haematocrit, blood pressure, urine output |
| Recovery | The following 2 to 3 days | Appetite returns; an itchy rash with pale islands; slow pulse; tiredness | Platelets rising; signs of fluid overload in anyone given a drip |
In the critical phase, small blood vessels become leaky and fluid shifts out of the bloodstream. In most people this is mild. In a minority it becomes severe dengue, with shock from low blood volume, serious bleeding or organ involvement, which is why the critical days need close monitoring rather than reassurance.
The warning signs of severe dengue
These are the signs that change the plan from home care to hospital: severe abdominal pain or tenderness, vomiting that will not stop, bleeding from the gums or nose, blood in vomit or stools, unusual drowsiness or lethargy, restlessness or irritability, cold or clammy hands and feet, fast breathing, and passing little or no urine. A blood count showing platelets falling fast together with a rising haematocrit, the share of the blood made up of red cells, is the laboratory version of the same warning. People with a second dengue infection, pregnant women, babies, older adults, and people with diabetes, obesity, kidney or heart disease are more likely to develop severe disease.
How we manage dengue at the clinic
Confirming the diagnosis and setting a baseline
If you have not yet been tested, the first step is a dengue test in Phuket matched to your day of fever, together with a full blood count that becomes the baseline for later comparisons. The doctor checks your pulse, blood pressure, hydration, abdomen and skin, asks about earlier dengue infections, and decides whether you can safely be managed as an outpatient.
Daily reviews through the critical phase
From about day 3 until the fever has been gone for 24 to 48 hours, we usually repeat the blood count every day, alongside a check of symptoms, blood pressure and fluid intake. These repeat blood tests in Phuket are the most reliable way to spot the leakage phase early. A falling white cell count often signals that the fever is about to break and the critical phase is near.
Medicines: what helps and what to avoid
Paracetamol is the only recommended painkiller and fever reducer, within the standard adult limit of 4 g in 24 hours and lower for small adults or people with liver disease. Ibuprofen, diclofenac, aspirin and other anti-inflammatory drugs should be avoided because they impair platelets and irritate the stomach, raising the risk of bleeding. Intramuscular injections are also avoided, since they can cause bruising in the muscle. Antibiotics do not work against the dengue virus, and steroids are not recommended. Anti-nausea medicine can help you keep fluids down.
When hospital is the safer place
We refer you for hospital admission if any warning sign appears, if you cannot drink enough, if your blood count shows rapid change, or if you are pregnant, very young, older or have a significant long-term condition. In hospital, intravenous fluids are given in carefully measured amounts, because too little fluid risks shock while too much during the leakage phase can collect in the lungs and abdomen.
Looking after yourself at home or in your hotel
Rest is not optional: stay in a cool room and avoid the pool, the beach and alcohol until the doctor clears you. Drink steadily through the day: water, oral rehydration salts, clear soups, fruit juice and coconut water all count. Aim to pass pale urine at least every 4 to 6 hours; going longer is a reason to call us. Some Thai doctors advise avoiding red or dark drinks so that blood in vomit or stools is not missed. Eat small, soft meals if you can, and do not worry about appetite for a few days.
Mosquitoes that bite you during the first days of fever can pick up the virus and pass it on, so sleep under a net or in air-conditioning and keep using repellent to protect your travel companions.
After the fever: recovery and flying home
Most people feel close to normal within one to two weeks, although tiredness and low mood can linger for several weeks, and some notice hair shedding two to three months later, which regrows. The recovery rash can itch intensely; an antihistamine helps. Return to exercise gradually. Before flying, wait until the fever has gone, the critical phase has passed and your platelets are clearly rising; the doctor can review your latest blood count and advise, and airlines may ask for a medical letter if you were recently unwell. Tell your own doctor at home that you have had dengue, because a future infection with a different type carries a higher risk of severe disease.
When to see a doctor
If you have a fever in Phuket with body aches or headache behind the eyes, see a doctor on the first or second day for testing. Once dengue is confirmed, keep every scheduled review, even on a good day, and come back sooner if you are struggling to drink or passing less urine.
Prevention and early detection
Aedes mosquitoes bite mostly in the early morning and late afternoon, so apply repellent containing DEET, picaridin or IR3535 through the day, reapply after swimming, and wear light long sleeves when you can. Remove standing water around villas, and choose rooms with screens or air-conditioning. Early detection means testing on the first days of fever and following platelets through the critical phase rather than waiting for symptoms to worsen. For people who have recovered from a confirmed dengue infection, a licensed dengue vaccine may be worth discussing before future trips to endemic areas; ask us on WhatsApp whether it is in stock today.
Dengue care with Takecare Clinic
Dengue reviews often fall early in the morning or late at night, so our 24/7 opening matters. Walk in to the Bangtao (Cherngtalay) clinic, our Kata-Karon clinic or the Patong clinic for your daily check, with blood count results from the on-site laboratory the same day. Message us on WhatsApp with your symptoms and results, or phone +66 81 718 9080; we confirm the price before your visit.
If travelling each day is exhausting, a doctor hotel visit in Phuket lets the review and blood sample happen in your room. Dengue is a new illness, so it is normally covered by travel insurance, including hospital referral. We offer direct billing with most travel insurers and provide receipts, a medical report and an itemised invoice.
Related services and treatments
If you are not sure dengue is the cause, our guide to fever treatment covers the other common causes of fever in Phuket. People sometimes ask whether a vitamin infusion will speed recovery; our IV drip therapy in Phuket page explains honestly that such drips offer rehydration and symptom relief but do not treat the virus, and during the critical phase any intravenous fluid should be medically directed. For other concerns, our walk-in doctor in Phuket service is open all hours, and you can browse the conditions we treat.
Summary
Dengue fever treatment is supportive: rest, steady fluids, paracetamol only, and no ibuprofen, aspirin or injections into the muscle. The dangerous window is the critical phase around days 3 to 7, as the fever falls, when daily blood counts and a watch for warning signs matter most. Most people recover fully in one to two weeks. Keep every review, protect companions from mosquitoes, and go to hospital or call 1669 at once for severe abdominal pain, persistent vomiting, bleeding, lethargy or restlessness.
“The day your fever breaks is not the day to relax. Keep drinking, keep your follow-up appointment and seek help at once for abdominal pain, vomiting or bleeding.”
Dr. Ponlawat Pitsuwan, Physician, Takecare Clinic Phuket
Frequently asked questions
Does travel insurance cover dengue treatment, including a hospital stay?
Dengue is a sudden illness, so most travel insurance policies cover the clinic visits, repeat blood counts, medicines and hospital admission if needed, subject to their terms and excess. We offer direct billing with most travel insurers and provide receipts, an itemised invoice and a medical report. Tell your insurer early if hospital admission looks likely, as some want advance notice.
How long will it take before I feel normal again?
The fever usually lasts 2 to 7 days, the critical phase another 1 to 2 days, and most people feel close to normal within one to two weeks. Tiredness, low mood and poor concentration can last several weeks, and some people notice hair shedding a few months later. Return to exercise and alcohol gradually, and only after the doctor is happy with your blood count.
Do I need an appointment for my daily blood count checks?
No. You can walk in to any of our three clinics at any hour for each review, and most people are seen within minutes. Try to come at a similar time each day so results are easier to compare, and bring your earlier reports. A WhatsApp message before you arrive lets us prepare your record.
Can the doctor monitor my dengue at the hotel instead?
Yes. Our doctors come to hotels and villas across Phuket around the clock to check your blood pressure, hydration and symptoms and take the blood sample for our laboratory. This suits people who feel too weak to travel. If the doctor finds warning signs, you will be advised to go to hospital and helped to get there.
Will an IV drip or papaya leaf raise my platelets faster?
Neither is a treatment for dengue. Intravenous fluids are useful when you cannot drink enough or show warning signs, but they should be given with careful monitoring, because excess fluid in the leakage phase can harm. Papaya leaf extract may nudge platelet counts up in small studies, without proven benefit on complications. Platelets recover on their own as the illness passes.
When is it safe to fly home after dengue?
Wait until the fever has gone, the critical phase has passed and your platelet count is clearly rising, which for most people is about a week after the fever started. The doctor can check your latest blood count and advise. Airlines may ask for a medical letter after a recent illness, and requirements vary, so check with your airline before booking.
Sources
The World Health Organization fact sheet on dengue and severe dengue describes the phases, warning signs and supportive treatment. The NHS page on dengue covers symptoms and home care after travel. The CDC dengue information hub explains prevention and when to seek care.
dengue fever, dengue virus, severe dengue, dengue haemorrhagic fever, dengue shock syndrome, plasma leakage, critical phase, warning signs, thrombocytopenia, platelet count, haematocrit, full blood count, NS1 antigen, paracetamol, NSAIDs, ibuprofen, aspirin, oral rehydration salts, intravenous fluids, platelet transfusion, papaya leaf extract, Aedes aegypti, secondary dengue infection, WHO, NHS, CDC, Bangtao, Cherngtalay, Kata, Karon, Patong, Takecare Clinic Phuket, Dr. Ponlawat Pitsuwan
This page is general health information and not a substitute for a medical consultation.