Overview
Thailand is reporting a month-over-month rise in dengue cases as of May 2026, and the pattern is expected to escalate with the May-October rainy season. Cases are concentrated in Bangkok, Chiang Mai, Phuket, and other urban and tourist areas.
Traveler Preparation
Pack These Items
| Item | Specification |
|---|---|
| Insect repellent | DEET 30%+ or picaridin 15%+ |
| Mosquito coils / plug-in repellent | For indoor use at night |
| Long sleeves and pants | Light colors preferred (mosquitoes favor dark) |
| Fever reducer | Acetaminophen (paracetamol) — NOT aspirin or ibuprofen; NSAIDs increase bleeding risk in dengue |
If You Develop a Fever
- Fever ≥38°C / 100.4°F with joint pain or severe headache → suspect dengue; seek a local clinic immediately
- Do not self-medicate with aspirin, ibuprofen, or other NSAIDs
- Contact your travel insurance's cashless assistance line
References
- US CDC Travel Health Notices: https://wwwnc.cdc.gov/travel
- WHO Disease Outbreak News: https://www.who.int/emergencies/disease-outbreak-news
This alert summarizes public advisories with pharmacist commentary. For treatment decisions, please consult a licensed medical provider.