Lately my boyfriend have been experiencing hot flashes, short breaths, sweating and a little claustrophobic(which he s not). I m worried because it only happens at night, and he always has the fan on high speed by the foot of his bed. I tried to find any motive for the symptoms like the type of clothes he wears to sleep, bed fabrics, anything but nothing. He s 18 years old 5,4 feet tall, in shape,athletic and has a good diet. Please help me, I m starting to think it s heart or lung problems.