It more than likely is ich. There are many treatments avaliable that are simple to use. My fish are just getting over it. I used "Quick Cure." You put a drop a gallon for 2 weeks. It also helps to raise the temp to 84 degrees. It speeds up the process of killing the ich.
Just a note: My fish are just getting over ich. Now a few of them have fungus. Be careful! Medicating the fish that did not have ich may have been a mistake. I've heard over medicating your fish can cause other diseases to develop. Make sure you research the disease and follow the directions on the medication.