go to someone's head
US /ɡoʊ tə ˈsʌm.wʌnz hɛd/
UK /ɡoʊ tə ˈsʌm.wʌnz hɛd/

1.
subir à cabeça, ficar arrogante
if success or praise goes to someone's head, it makes them feel more important than they really are
:
•
Don't let that small victory go to your head.
Não deixe essa pequena vitória subir à sua cabeça.
•
After winning the award, his ego really started to go to his head.
Depois de ganhar o prêmio, o ego dele realmente começou a subir à cabeça.