Constant Snake Dreams

Can anyone tell me why I keep dreaming of snakes, I don't think they've ever harmed me in the dreams but they're always in my dreams.

What colour are they and where do you see them?

Be careful. Watch the people that you surround yourself with. I use to get those dreams,too.

http://thedreamtribe.com/snake-dreams-symbols-and-their-meaning/

They're usually different colors, I remember having one dream were I opened the back door and my entire backyard was covered in millions of snakes of different patterns.