http://www.denialville.com/replacing-faucet-washers/
Faucet in kitchen?
Our kitchen sink faucet sprays water from the top seam before the spray head. It makes a huge mess. Will simply replacing a washer fix this situation or is it time to get a new faucet for the sink? If fixable, please explain how. Thanks.
You did not specify what type of faucet you have, check out the link below. It will tell you about the different types and how to repair them.
http://homerepair.about.com/od/plumbingrepair/ss/faucet_types.htm
Hope it helps.