my 3.5 month son was dignosed with hole in the heart..and there is also water in his lungs..is there any way to cure them

Some hole in the hearts need to be repaired, and some don't, those that do are often repaired when your child is an infant. Here is some info: https://www.nhlbi.nih.gov/health/health-topics/topics/holes/treatment What was your doctor's recommendation?? Always good to get a second opinion from another doctor