rear its (ugly) head

US /rɪər ɪts (ˈʌɡli) hɛd/
UK /rɪər ɪts (ˈʌɡli) hɛd/
"rear its (ugly) head" picture
1.

asomar su fea cabeza, reaparecer

if an unpleasant situation or problem rears its head, it appears or occurs, especially after being hidden or dormant for a period

:
The old rivalry between the two teams began to rear its ugly head again.
La antigua rivalidad entre los dos equipos comenzó a asomar su fea cabeza de nuevo.
Whenever we discuss money, his true colors rear their ugly head.
Siempre que hablamos de dinero, sus verdaderos colores asoman su fea cabeza.