The lack of sanitation throughout the Indonesian islands raises the risk of contracting travelers’ diarrhea. Be sure to take precautions by avoiding unreliable restaurants, uncooked foods, and local water. Should you develop any symptoms, do not assume you can just shake it off. Doing so may leave you feeling worse and in need of medical attention.
Insect borne illnesses
Illnesses contracted via insects are a serious threat to travelers. These include dengue fever and malaria, neither of which should be dismissed. These illnesses are serious and will end your trip quickly. Be sure to receive all necessary vaccinations and take precautions by using with lotions/sunscreens/repellants with high percentages of DEET.
Don’t drink the water
Local water is tainted with numerous strains of bacteria, chemicals, and other elements that should not be ingested. Use bottled water at all times, ensure that the bottle is sealed, and is a reputable brand. Ice in all beverages should also be avoided.
The air quality in Indonesia can be very poor, mainly in the major cities and especially in Jakarta. If you have respiratory problems, you should consult with your doctor about the best way to protect yourself while in Indonesia.
Use caution when drinking alcoholic beverages in Indonesia. Not only can these beverages inhibit your decision-making, but also there have been cases of homemade brews being laced with date-rape drugs. Never leave drinks unattended, do not drink home brews, and limit your alcohol intake.