Why do many celebrities have bulges on their foreheads?

Legend has it that extremely smart people generally have big heads, and the big bag on their heads is a symbol of wisdom. In fact, this is an individual phenomenon, just because celebrities have grown up.

The most common cause of forehead bulge is related to the skin and sebaceous glands on the forehead. If sebaceous cyst is accompanied by infection, this kind of hard bag may appear. At this time, there is often a small black dot opening on the hard bag. If sebaceous cyst is infected, it may even be red, swollen and painful, which is caused by infection of skin accessory organs or sebaceous gland blockage. This is the most common situation.