I m too worried. i ve gt exams so can't b ableto sleep properly.does t causes anythingto my hhealth? ?

Yes: Decreased sex drive, car accidents, heart attacks, arrhythmias, stroke, diabetes, hypertension, clotting disorders, " dumbing down" of your intellect, decreased concentration and attention span, depression, anxiety, premature aging of your skin, forgetfulness, impaired judgement, weight gain, and death. Good night.

yes if prolonged: A healthy person should not suffer serious consequences from a few nites of poor sleep but long-term lack of sleep can cause anxiety, depression, fatigue, poor memory ; concentration, muscle aches, decreased immunity etc. Exams are important but so is your health; it should be possible to pass exams without sacrificing sleep. Exercise, learn stress-reduction techniques ; see my comment:.