Dear, U dont need to get tension about this.It's becoz of hot weather..anyway, consult with a doctor to make sure. My friend has the same problem, I brought him to Hamad Emergency twice due to nose bleeding.actually it's horrible.. but, the Doctor said it's not a serous matter,it's just because of dry atmosphere...so don't worry... don't squeeze your nose in bleeding time, just press some Ice cubes on ur upper nose for sometime..it'll be stopped...