When I’m very excited my glans turns purple. It looks strange. What to do?

When you get excited the penis becomes erect, because blood streams in. At the plateau phase, being close to orgasm, the ridge of the glans often becomes more prominent and the glans can change colour. From reddish it can turn into a purple-blue. This happens with 20% of the guys. With girls it can be the same way: their labia changing colour when they get excited. This is completely normal. So nothing is wrong: this is how your body works.