When Liam was born he was premature, which meant that he was born too small. When Liam was born, the doctors told his parents Liam had a slim chance of living because he was born with one kidney. Since Liam only has one kidney , he can't drink much and his heart rate can't be high. Magically, Liam's kidney has healed itself. Liam posted on twitter that when he went to the doctor they surprisingly said that his kidney is now fully formed and is working properly. Liam was surprised that it was fully formed because when he went to the doctor 2 years before that, the doctors said that his kidney has affected him even worse. One Direction missed many concerts because Liam had been too sick to even walk. Now that Liam is in full heath everyone is wondering if Liam is still going to be "The Daddy" of the band or become just like the rest, drinking and partying.