To get a bunion, which is a bony bump that forms at the base of the big toe, you typically need to have a combination of genetic predisposition and factors such as wearing tight or ill-fitting shoes, foot injuries, or certain medical conditions like Arthritis. Over time, these factors can cause the big toe to lean inward towards the second toe, leading to the formation of the bunion. It’s important to consult a healthcare professional for advice on prevention and management if you're concerned about bunions.