Nomad have a wide range of Insect and Mosquito repellents. Find the insect repellent and bite avoidance products for your trip. There are many tropical diseases spread through insect bits. There are vaccines and medicines available to help protect against some, others are prevented only through avoiding insect bites.
Spray insect repellents containing DEET on your skin, cover up with clothing, preferably treated with clothing treatment and sleep under mosquito nets which have also been treated. This is your best defense action against nasty mozzies.