A disease due to unhygienic environment Dengue fever has become the ‘talk of the country’ of Bangladesh at present. It has spread throughout whole Bangladesh in an epidemic form. It is a virus fever. There are four different antigenic varieties of dengue viruses and all are transmitted by the daytime biting of adies aegypty mosquito. They are DEN-1, 2, 3 & 4 serotypes. From these viruses, two forms of dengue are recognised. One of them is classical dengue fever and the other is dengue haemorrhagic fever. Classical dengue fever is characterised by the abrupt onset of fever, malaise, headache, facial flushing, troubles pain. This pain is worse on eye movements, conjunctival suffusion and some backache that is a prominent symptom. Lymphadenopathy, petichae on the soft palate and skin rashes may also occur. This classical dengue fever is recovered by seven days. The patient of classical dengue fever should drink adequate water, take complete rest, drink a lot of liquid food, wash whole body with wet-cloth and finally should take the tablets of paracitamol group to decrease the fever. Dengue haemorrhagic fever is very severe. It is believed to be the result of two or more sequential infections with different dengue serotypes. If the symptoms of dengue haemorrhagic fever of a patient are found, we should take him to the hospital and consult with a doctor immediately. We have to wash the patient’s body again and again with a wet-cloth to mitigate fever. At the extreme case, it may be bleeding. The patient may be given paracitamol but never should be given aspirin group. It is a disease of children and has been found in South Asia and Africa. Adies lays its eggs on standing or stagnant water in the holes of trees, plastic bottles, plastic cans, tin-pots, tyres, green coconut plates, polythene bags etc. All of us should be conscious about the eradication of adies mosquitoes and should take necessary steps for that. Besides, government should highlight it through different media and should take essential measures to protect dengue fever.