Health care in Cambodia is poor. Even the best hospitals have inadequate facilities, low standards of cleanliness and appalling patient care, and should be used only in a dire emergency. For anything serious, if you are able to travel then get to Bangkok. Should you have no option but to go to a Cambodian hospital, try to get a Khmer-speaker to accompany you.

In Phnom Penh a couple of private Western-oriented clinics offer slightly better care than the hospitals, at a higher cost. If you get ill outside Phnom Penh or Siem Reap, self-diagnosis and treatment is often better than visiting a clinic. Wherever you seek medical attention, you will be expected to pay upfront for treatment, medication and food.

Although every town has a number of pharmacies (typically daily 7am–8pm) stocking an extensive range of medications, the staff aren’t required to have a dispensing qualification, so you may want to check the product sheets (and even expiry dates) before you buy. Fake medicines abound and there’s no easy way to determine if what you’re buying is the real thing. Whenever possible buy only in Phnom Penh or Siem Reap, which have a couple of reputable pharmacies employing qualified personnel who can help with diagnosis and remedies for simple health problems.

Consider getting a pre-trip dental check-up if you’re travelling for an extended period, as the only places to get reliable dental treatment in Cambodia are in Phnom Penh and Siem Reap. If you wear glasses, it’s worth taking along a copy of your prescription (or a spare pair of glasses); you can get replacements made quite cheaply in Phnom Penh and Siem Reap.

Vaccinations and immunizations

It’s worth checking before you leave that you are up to date with routine immunizations, such as tetanus and diphtheria. For Cambodia, you should consider immunizing yourself against hepatitis A, tuberculosis and typhoid; inoculations against hepatitis B, rabies and Japanese encephalitis are recommended if you are going to be at a particular risk (for example if you’re working in a remote area). You’ll need to produce proof that you’ve been vaccinated against yellow fever in the event of arriving from an infected area (West and Central Africa, or South America).

It is as well to consult your doctor or travel clinic as early as possible since it can take anything up to eight weeks to complete a full course of immunizations. All inoculations should be recorded on an international travel vaccination card, which is worth carrying with you in case you get sick.


Hepatitis A, a viral infection of the liver, can be contracted from contaminated food and water – shellfish sold by hawkers and untreated water are particular risks in Cambodia – or by contact with an infected person. Symptoms include dark-coloured urine, aches and pains, nausea, general malaise and tiredness, with jaundice following after a few days. A blood test is needed for diagnosis, and rest, plenty of nonalcoholic fluids and a high-carbohydrate diet are recommended for convalescence. A single shot of immunoglobulin offers short-term protection against hepatitis A.

Far more serious is hepatitis B, passed via contaminated body fluids; it can be contracted through non-sterile needles (including those used in tattooing and acupuncture), sexual contact or from a blood transfusion that hasn’t been properly screened. Symptoms include nonspecific abdominal pain, vomiting, loss of appetite, dark-coloured urine and jaundice. Immunization may be recommended if you are staying in Asia for longer than six months. If you think you have contracted hepatitis B, it’s especially important to seek medical attention.

A combined vaccine is available offering ten years’ protection against hepatitis A and five years’ against hepatitis B; your doctor will be able to advise on its suitability.

Tuberculosis, rabies and tetanus

Tuberculosis, contracted from droplets coughed up by infected persons, is widespread in Cambodia and is a major cause of death in young children. You may have been inoculated against the disease in childhood, but if you’re unsure, consider a skin (Heaf) test, which will determine if you already have immunity.

Rabies is contracted from the bite or saliva of an infected animal. Vaccinations are recommended if you’re going to be spending a long time in rural areas; but even if you’ve been vaccinated, if you are bitten (or licked on an open wound) you will need to get two booster injections as quickly as possible, preferably within 24 to 48 hours.

Tetanus, a bacterial infection that causes muscular cramps and spasms, comes from spores in the earth and can enter the blood circulatory system through wounds and grazes. If left untreated it can cause breathing problems and sometimes death. It’s worth checking if you’ve been vaccinated against tetanus in the last ten years and getting a booster if necessary.

Typhoid and cholera

Typhoid and cholera, bacterial infections that affect the digestive system, are spread by contaminated food and water, and outbreaks are thus usually associated with particularly unsanitary conditions.

Symptoms of typhoid include tiredness, dull headaches and spasmodic fevers, with spots appearing on the abdomen after about a week. Vaccination is suggested if you plan to stay in rural areas of Cambodia, but it doesn’t confer complete immunity, so it remains important to maintain good standards of hygiene.

Sudden, watery diarrhoea and rapid dehydration are among the symptoms of cholera, and medical advice is essential to treat the infection with antibiotics. Vaccination is no longer recommended for cholera due to its poor efficacy. From time to time there are outbreaks of cholera in Cambodia that are well publicized in the media.

General precautions

Cambodia is a hot and humid country, and dehydration is a potential problem, its onset indicated by headaches, dizziness, nausea and dark urine. Cuts and raw blisters can rapidly become infected and should be promptly treated by cleaning and disinfecting the wound and then applying an air-permeable dressing.

Bites and stings

Insects are legion in Cambodia and are at their worst around November, at the start of the dry season, when there are stagnant pockets of water left from the rains. Even during the hot season (March–May) they come out in the evenings, swarming around light bulbs and warm flesh – they’re annoying rather than harmful, with the exception of mosquitoes.

On the coast, sand flies appear in the late afternoon and evening, delivering nasty bites that don’t erupt until a few hours later, when they become incredibly red and itchy. Once you scratch, the bites become even more inflamed and can take up to a month to recede, leaving behind nasty scars. These little blighters have a limited range and mostly attack victims on the sand; if you’re on or near the beach, it’s probably best to use an insect repellent.

Sun and heat

Even when the sky is overcast the Cambodian sun is fierce, and you should take precautions against sunburn and heat stroke wherever you are. Cover up, use a high-protection-factor sunscreen, wear a hat and drink plenty of fluids throughout the day.

Hygiene and stomach complaints

Though catering facilities at many restaurants and food stalls can appear basic, the food you’ll be served is usually absolutely fresh; all ingredients are bought daily and are mostly cooked to order. A good rule of thumb when selecting a place to eat is to pick one that is popular with local people, as the Khmers are fussy about their food and seldom give a place a second chance if they’ve found the food isn’t fresh. Food from street hawkers is usually fine if it’s cooked in front of you. Tap water isn’t drinkable, but bottled water is available everywhere – stick to that and be cautious with ice, which is often cut up in the street from large blocks and handled by several people before it gets to your glass (though in Western restaurants it will probably come from an ice-maker).

Stomach complaints

The most common travellers’ ailment is upset tummy. Travellers’ diarrhoea often occurs in the early days of a trip as a result of a simple change in diet, though stomach cramps and vomiting may mean it’s food poisoning. If symptoms persist for more than a couple of days, seek medical help as you may need antibiotics to clear up the problem.

Most diarrhoea is short-lived and can be handled by drinking plenty of fluids and avoiding rich or spicy food. Activated charcoal tablets help by absorbing the bad bugs in your gut and usually speed recovery; they’re sold across the counter at pharmacies, but it’s worth bringing some with you from home. It’s often a good idea to rest up for a day or two if your schedule allows. In the event of persistent diarrhoea or vomiting, it’s worth taking oral rehydration salts, available at most pharmacies (or make your own from half a teaspoon of salt and eight teaspoons of sugar per litre of bottled water).

Unless you’re going on a long journey, avoid taking Imodium and Lomotil. These bung you up by stopping gut movements and can extend the problem by preventing your body expelling the bugs that gave rise to the diarrhoea in the first place.

Dysentery and giardiasis

If there is blood or mucus in your faeces and you experience severe stomach cramps, you may have dysentery, which requires immediate medical attention. There are two forms of the disease, the more serious of which is amoebic dysentery. Even though the symptoms may well recede over a few days, the amoebae will remain in the gut and can go on to attack the liver; treatment with an antibiotic, metronidazole (Flagyl) is thus essential. Equally unpleasant is bacillary dysentery, also treated with antibiotics.

Giardiasis is caused by protozoa usually found in streams and rivers. Symptoms, typically watery diarrhoea and bad-smelling wind, appear around two weeks after the organism has entered the system and can last for up to two weeks. Giardiasis can be diagnosed from microscope analysis of stool samples, and is treated with metronidazole.

Mosquito-borne diseases
Given the prevalence in Cambodia of serious diseases spread by mosquitoes, including multi-resistant malaria, it is important to avoid being bitten. Mosquito nets often aren’t provided in guesthouses and hotels, so it’s worth bringing your own.

Wearing long trousers, socks and a long-sleeved top will reduce the chances of being bitten. Insect repellents containing DEET are the most effective, although you may want to consider a natural alternative such as those based on citronella.


Malaria is prevalent year-round and throughout the country – with the exception of Phnom Penh, Siem Reap and the area immediately around the Tonle Sap lake. More than 40,000 cases were reported in 2013, and almost 70,000 in 2012.

Malaria is contracted from the night-biting female anopheles mosquito, which injects a parasite into the bloodstream. Chills, fevers and sweating ensue after an incubation period of around twelve days, often along with aching joints, a cough and vomiting, and the symptoms repeat after a couple of days. In Cambodia the dangerous falciparum strain of the disease predominates; if untreated, it can be fatal.

Before you travel, it is important to take advice on a suitable prophylaxis regime, as a course of antimalarial medication needs to be started in advance of arriving in a risk area. Malarone (atovaquone/proguanil) and doxycycline are the two most frequently prescribed antimalarials for Cambodia. Mefloquine (aka Larium) is also sometimes recommended, but has the drawback of well-publicized side effects and may not be effective in western and northern provinces close to the Thai border thanks to the presence of mefloquine-resistant malaria in these areas. Note that taking antimalarials doesn’t guarantee that you won’t contract the disease, a fact that reinforces the need to avoid being bitten.

Emergency treatment for falciparum malaria is 600mg of quinine sulphate, taken three times a day for three days, followed by a single dose of three Fansidar tablets once the quinine course is completed. These tablets are available over the counter at pharmacies throughout Cambodia, but if you suspect malaria you should still see a doctor for a diagnostic blood test.

Dengue fever

Outbreaks of dengue fever occur annually in Cambodia with 37 deaths reported in 2009. Spread by the day-biting female aedes mosquito, this is a viral disease that takes about a week to develop following a bite. It resembles a bad case of flu; symptoms include high fever, aches and pains, headache and backache. After a couple of days a red rash appears on the torso, gradually spreading to the limbs. There may also be abnormal bleeding, which requires medical attention.

No vaccine is available at the time of writing, and there is no effective treatment, although paracetamol can be taken to relieve the symptoms (not aspirin, which can increase the potential for bleeding); you should also drink plenty of fluids and get lots of rest. Although the symptoms should improve after five or six days, lethargy and depression can last for a month or more – consult a doctor if symptoms persist. Anyone who has previously contracted dengue fever is at particular risk if they subsequently contract a different virus strain, which can result in dengue haemorrhagic fever. In this condition the usual symptoms of dengue fever are accompanied by abdominal pain and vomiting; immediate medical help should be sought, as it can be fatal.

Japanese encephalitis

Japanese encephalitis is a serious viral disease carried by night-biting mosquitoes that breed in the rice fields. The risk is highest between May and October. It’s worth considering vaccination if you’re going to be in rural areas of Cambodia for an extended time or are visiting during the high-risk period. Symptoms, which appear five to fifteen days after being bitten, include headaches, a stiff neck, flu-like aches and chills; there’s no specific treatment, but it’s wise to seek medical advice and take paracetamol or aspirin to ease the symptoms.

Sexually transmitted diseases

Cambodia has one of Asia’s highest levels of HIV/AIDS infection, much of it the result of the country’s burgeoning sex trade. An estimated 0.7 percent of the adult population aged 15–49 carries the disease, although rates are slowly falling from a high of 2 percent at the beginning of the millennium thanks to vigorous intervention by health services. Syphilis and gonorrhoea are also rife. Condoms are widely available, although it’s best to stick to Western brands wherever possible.

Medical resources

Canadian Society for International Health Extensive list of travel health centres.

CDC Official US government travel health site.

Hospital for Tropical Diseases Travel Clinic UK

International Society for Travel Medicine A full list of travel health clinics.

MASTA (Medical Advisory Service for Travellers Abroad) UK for the nearest clinic.

Tropical Medical Bureau Ireland

The Travel Doctor – TMVC Lists travel clinics in Australia, New Zealand and South Africa.

Book through Rough Guides’ trusted travel partners

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