What To Bring
Bangkok, Chiang Mai, Phuket and Pattaya are modern destinations with most amenities found in Europe or North America. Lip balm and moisturizers are needed in the north during the cool season ( November/December). Sunglasses and hats are useful items to protect eyes and sensitive skin from tropical glare.

What To Wear
Clothes should be light and loose; natural blends that breathe are preferable to synthetics. The cool season in the north can be chilly; a sweater will be welcome, especially when travelling in the hills. Suits are worn for business and in many large hotels, in general, Thailand lacks the formal dress code of Hong Kong and Tokyo. Open shoes (sandals during the height of the rainy season, when some Bangkok street get flooded) and conservation dresses (with sleeves) for women or short-sleeved shirts for men are appropriate. It is not appropriate for men to walk around cities and towns without a shirt.
The clothing code for Buddhist temples and Muslim mosques is more conservative than on the street. Shorts are taboo for both women and men wanting to enter some of the important temples. Those wearing sleeveless dresses may also be barred from certain temples. Improperly dressed and unkempt visitors will be turned away from large temples like the Wat Phra Kaew ( Temple of the Emerald Buddha) and from the Grand Palace in Bangkok. Dress properly in deference to the religion and to Thai sensitivities.

Health / Hygiene
Thais place high value on personal hygiene and are aware of the danger of germs and infections. Establishments catering to foreigners are generally careful with food and drinking preparation. They do not, however, place such as high priority on keeping the environment clean.
Bangkok water is clean when it leaves the modern filtration plant; the pipes that carry it into the city are somewhat less than new, however, and visitors are advised to drink bottled water or soft drinks. Both are produced under strict supervision, as is the ice used in large hotels and restaurants. Most street side restaurants are clean; a quick glance should tell you which are and which are not.

Medical Services
First class hotels in Bangkok, Chiang Mai and Phuket have doctors on call for medical emergencies. The hospitals in these three destinations are equivalent of those in any major Western city. Intensive care units are fully equipped and staffed by doctors to handle emergencies quickly and competently. Nursing care is generally superb, because there is a high staff-to-patient ratio. Many doctors have been trained in Western hospitals, and even those who have not spoke good English. Most small towns have clinics which treat minor ailments and accidents. In the unlikely event that you suffer a criminal attack in Bangkok, you must go to a police hospital situated at Ratchaprasong intersection.

ATM/Debit Cards
Most banks now have ATM machines outside, open around the clock. Currency is dispensed in Baht only. Occasionally, an ATM card may not work at one machine for some specified reason; try another branch of the same bank and results may be different. Alternatively, Master Card and Visa debit cards (as distinct from credit cards) are also accepted at many ATM machines and increasing in large number of local merchants. Most banks have signs with an array of symbols indicating which cards are accepted at the machine. Periodically, cards are accepted at machines in spite of the fact that no related sign appears out front. When in doubt, give it a try, but be prepared to be flexible.

Credit Cards
American Express, Master Card, Visa and Diners Club are widely accepted in tourists area. In provincial destinations, it is better to check that credit cards are accepted, and not to count on using them.
If you lose your credit card, notify the relevant company at one of the following offices in Bangkok: