Malformation is when something is not formed correctly. Just like when you try to build a tower with blocks but some blocks are placed in the wrong way, the tower will not look right. The same thing happens in our body as well. When we are growing inside our mother's tummy, sometimes something goes wrong and a body part or organ doesn't form the way it should. This can cause problems and the body may not work as well as it should. It's like having a puzzle with a wrong piece, it just doesn't fit properly. A doctor can help fix the malformation if possible, so that everything can work the way it should.