KERBSIDE CONSULT
Cyberdoc — writing on medicine since 1995
4/2026 · 28 August 2026 · Kuala Lumpur
What to do about dengue. Plain, practical, and one screen long.
Dengue is common enough here that almost everyone either has had it or knows someone who has. Most cases are unpleasant and pass. A minority turn serious, and the serious turn happens later than people expect — which is the one fact worth remembering above everything else on this page.
The mosquito that carries dengue breeds in small amounts of clean, still water — not drains, not ponds. Flower pot trays. Roof gutters. Discarded tyres. A pet bowl left too long. An upturned bottle cap holds enough.
The habit that actually works, once a week: empty, scrub, cover, throw. Empty anything holding water. Scrub the container — eggs stick to the sides even after the water is gone. Cover what you cannot empty. Throw away what you do not need.
Fever, headache, pain behind the eyes, muscle and joint aches. For the first few days this is indistinguishable from flu, and most people manage it at home without incident.
Here is the part that catches people out. The dangerous phase is not while the fever is high. It is in the day or two after the fever breaks, typically days 3 to 7. A person who starts feeling better and then suddenly feels much worse is not imagining it. That is when severe dengue develops, and it is exactly when people stop paying attention because they think the worst has passed.
Any of these means: do not wait it out. Get seen. This list follows Malaysia's own Clinical Practice Guidelines for dengue infection.
This is an emergency, not something to monitor at home.
Malaysia's own clinical guidelines — for adults and separately for children — name a specific higher-risk group: anyone who is pregnant, obese, aged over 65, or living with diabetes, high blood pressure, heart failure, kidney disease, chronic lung disease (COPD), or ischaemic heart disease.
If you are in this group, doctors are advised to consider admission even without any warning sign above. So do not wait to see whether you develop one. Mention the fever early, and mention the condition alongside it.
Dengue is also more dangerous the second time, if the second infection is a different strain from the first. There is no way to know which strain you had before, so the practical advice is the same either way: take a second dengue fever more seriously, not less.
Rest, and fluids — more than feels necessary, and watch for reduced urination as a sign you are not keeping up.
Paracetamol for fever and pain — no more than 4 grams a day. Dengue can affect the liver, and Malaysia’s own clinical guidelines say the paracetamol dose needs care because of it. Check any combination cold-and-flu product for paracetamol too — it is easy to go over the limit without noticing if you stack products.
Avoid NSAIDs — aspirin, ibuprofen, mefenamic acid (Ponstan), and diclofenac are all included. These are common over-the-counter painkillers in Malaysia, and all of them raise the risk of bleeding, which is dengue’s main danger.
A dengue vaccine exists and is registered in Malaysia, available at private clinics for roughly RM400 to RM500 for the two-dose course. It is not part of the free national programme yet, and the question of why is a longer story than belongs here — The Vaccine We Have … For Some covers it in full, if you want the whole argument.
This page is the practical summary. The fuller account of dengue in Malaysia — the epidemiology, the vaccine debate, the numbers — is at Dengue and Dengue Haemorrhagic Fever and The Vaccine We Have … For Some.
Content current as at 28 August 2026. Links last checked 28 August 2026.
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