I got this lump on top of my forehead,someone told me it could be a bloodclot,im doing a lifelinescreening in 3 wks,where they check for blockages,would they find it if it was?can it wait 3 wks?im also seeing a dermo to make sure its not a tumor?

It is more likely to be a sebaceous cyst rather than a blood clot. It is good that you are seeing a dermatologist. Wish you good health!

A blood clot can be serious if it is present inside the blood vessels inside the skull. But in the forehead there is no reason to have a blood clot. You should show it to a skin specialist or to your family doctor. it is likely something benign or it can be a hematoma if you may have bumped yourself into some hard surface. How long have you had this swelling? That can lead us to determine the caus