The sun and the heat can cause a few unexpected problems. Many people get a bout of prickly heat rash before they've acclimatized. It's an infection of the sweat ducts caused by excessive perspiration that doesn't dry off. A cool shower, zinc oxide powder (sold in India) and loose cotton clothes should help. Dehydration is another possible problem, so make sure you're drinking enough liquid, and drink rehydration salts frequently, especially when hot and/or tired. The main danger sign is irregular urination (only once a day for instance); dark urine definitely means you should drink more (although it could also indicate hepatitis).

 

The sun can burn, or even cause sun-stroke, and a high-factor sun block is vital on exposed skin, especially when you first arrive, and on areas newly exposed by haircuts or changes of clothes. A light hat is also a very good idea, especially if you're doing a lot of walking around in the sun.

Finally, be aware that overheating can cause heatstroke , which is potentially fatal. Signs are a very high body temperature, without a feeling of fever but accompanied by headaches and disorientation. Lowering body temperature (taking a tepid shower for example) and resting in an air-conditioned room is the first step in treatment.