need help with bloating on one side

[bigL35]

So I have had my fish for a couple months now and last week his stomach started bloating but only on one side, and its gotten worse and his body is curling to the opposite side of the bloating, can any one help my fish? :(

[Oldfishlady]

Sorry you are having problems...a few questions...

How big is the tank, how much and how often on the water changes and when was the last one, filtration used if any or live plants, additives used, water temp, type of food and how much and often fed, any treatment tried?
Can you post a pic?