I gat a swelling on my forehead which i have been treating..i applied ice to it and d skin round d swelling turned ligther dan oda parts..what do i do?

Pallor: Ice causes blood vessels to constrict so the skin becomes temporarily pale. Usually it is soon followed by reddening then a return to normal. If your pale mark is long standing, it is unlikely to be due to the ice unless this first caused a "burn". See your doctor for advice about the swelling and pale mark.

Swelling: If this wasn't caused by injury, it could be an inclusion cyst. If it developed after a blow to the forehead, it most likely is a hematoma(blood collection under the skin) which is treated with cold applications(to stop the bleeding) for a couple of days and then warm applications which helps break it down. However It's best to be examined by a physician for diagnosis and treatment.