Nel corso degli anni Williams ha combattuto diverse [[Disturbo mentale|malattie mentali]],: [[DepressioneDisturbo esistenzialedepressivo|depressione]] e problemi di [[autostima]], [[Ansia da prestazione|ansia]], [[obesità]], [[dismorfofobia]], [[andropausa]] e [[agorafobia]].<ref name=":78">{{Cita web|url=https://www.news.com.au/entertainment/music/robbie-williams-secret-threeyear-health-battle-i-couldnt-do-anything/news-story/cb1258cff398af26024f3bd6c4edf7af|titolo=Robbie Williams reveals secret health battle|sito=NewsComAu|data=2019-07-14|lingua=en|accesso=2021-04-01}}</ref><ref>{{Cita web|url=https://www.nme.com/news/music/robbie-williams-mental-health-battle-2249671|titolo=Robbie Williams opens up about his mental health battle|sito=NME|data=2018-02-28|lingua=en|accesso=2021-04-01}}</ref><ref>{{Cita web|url=https://www.contactmusic.com/news/williams-suffering-from-hormone-imbalance_1169373|titolo=Williams Suffering From Hormone Imbalance|sito=Contactmusic.com|data=2010-10-06|accesso=2021-04-01}}</ref><ref>{{Cita web|url=https://celebrity.nine.com.au/latest/robbie-williams-battle-with-depression/f03626d5-5da3-4f13-a437-ccfce368f9bf|titolo=Robbie Williams has opened up about his struggles with anxiety and depression|sito=celebrity.nine.com.au|lingua=en-AU|accesso=2021-04-01}}</ref> Tra gli anni 90 e 2000, il cantante ha sviluppato una grave [[Alcolismo|dipendenza da alcol]] e da [[Abuso di drogaTossicodipendenza|sostanze stupefacenti]] che lo ha portato a disintossicarsi in appositi centri per due volte, nel 1997<ref name=":67" /><ref name=":66">{{Cita pubblicazione|titolo=Elton John Forced Robbie Williams Into Rehab {{!}} The Jonathan Ross Show|accesso=2021-03-23|url=https://www.youtube.com/watch?v=j1AStdQkfr8}}</ref><ref name=":68">{{Cita libro|nome=Blackman|cognome=Shane|titolo=Chilling Out: The Cultural Politics of Substance Consumption, Youth and Drug Policy|url=https://books.google.it/books?id=UuvX3QwKXm8C&pg=PA97&lpg=PA97&dq=robbie+williams+tabloid+1996&source=bl&ots=863vjGrblG&sig=ACfU3U1rao65R-FI3dx7Xy7QvtR8tMwqFQ&hl=it&sa=X&ved=2ahUKEwjS7_K_g8bvAhXLuaQKHfcLBPo4FBDoATAFegQIBxAD#v=onepage&q&f=false|accesso=2021-03-23|data=2004-07-01|editore=McGraw-Hill Education (UK)|lingua=en|ISBN=978-0-335-20072-6}}</ref> e nel 2007.<ref name=":72" /><ref name=":71">{{Cita libro|nome=Chris|cognome=Heath|titolo=Reveal: Robbie Williams|url=https://books.google.it/books?id=WyQmDwAAQBAJ&pg=PT59&lpg=PT59&dq=rudebox+worst+song+ever&source=bl&ots=GySyaIvmh9&sig=ACfU3U2CfSG3PwVGxypLU96xwjV5zF1MjA&hl=it&sa=X&ved=2ahUKEwj5gKbw-cvvAhXFAewKHYlCCJw4HhDoATADegQIARAD#v=onepage&q=rudebox%20worst%20song%20ever&f=false|accesso=2021-03-25|data=2017-09-21|editore=Bonnier Publishing Ltd.|lingua=en|ISBN=978-1-911600-26-8}}</ref>
