Need help with turtle?

Ok. My turtle went threw the same thing idk if i did the procedures right but my turtle did heal. First I let my turtle dry out by keeping it out of the water for a good 15-25 minutes. Next i put the turtle on a cloth and took a needle. I then gently stuck the needle a little bit into it resulting in this liquid type stuff (lookes like that type of stuff human cuts if its really bad pus or whatever) coming out of the bumb. Gently squezze it until you think it is all out. Next put the antibiotics on top of where your stuck the needle in. Clean the tank fully with disinfectant and and any other stuff you usually clean your tank with. But before you clean your tank put the turtle in a sink or bowl with water to let it soak and get moist again. After your done with the tank. Put the turtle back in the water in the tank. Put the anitbiotics on every morning and every night for a week or 5 days. And in a matter of time it will be all better. Its not professional but my great grandfather taught me this and it works. Drying the turtle will reduce the pain.But it is really better to take it to the vet because of the risk of killing your turtle and head trauma. Since they are in medical business i think they can get discounts only costing them around $40-100