How would I know if I had planters fasciitis?

Planters fasciitis is the most common reason for having pain in the heel of your foot. You would know if you have it when you take your first steps from getting out of bed or having been sitting for a long time and you start experiencing pain in your foot. Sometimes it might help to get walking a bit more, but the pain will get worse through out the day. Also, when you go to walk up stairs, you would experience quite a lot of pain. I'm not sure if you have this condition, since I don't know your symptoms. But, if you think you have it, you should definitely go to the doctors and get it checked out.