Why do you have a bump on the left side of your sideburns?

A bump on the left side of your sideburns could be due to several reasons, such as an ingrown hair, a cyst, or a pimple caused by clogged pores. It could also be a result of skin irritation or an allergic reaction to products used in that area. If the bump persists, becomes painful, or shows signs of infection, it's advisable to consult a healthcare professional for an accurate diagnosis and appropriate treatment.