Getting rid of 9.2 GB of messages?

So I have an iphone 5s 16 GB. Heres the problem, it says I have 9.2 GB of saved messages on my phone, and I'm not sure how to get rid of any of it. It's so bad to the point where I can't even take a picture because my storage is so full or I have to delete all my apps, (I only have 4 apps on my phone which is Twitter, Instagram, Snapchat and Words with friends) And no other ones besides what the phone comes with. I got this phone in September but its a pain in the but when I wanna download an app and can't or take a picture but no storage left?! But please, help would be much appreciated! I really need to know how to get rid of "9.2 GB Messages (Saved)" Thank you!

Delete them…

Go to messages, and if you launch in a conversation, hit back. From there, all of those rectangles you see, swipe right and delete. You will be good once all of those pesky things are gone. Keep any ones that you may need in the future.