Getting your nails done is a hassle, so nowadays people get shellac so that it stays on for around 2 weeks without chipping. But there are side effects to getting shellac. First of all, the nail polish damages the nail bed and makes the nail much thinner. Secondly, if you get shellac then you put your hands under a UV light, which is bad for your body if done frequently. Be careful and try not to get shellac every time you get your nails done!