rear its (ugly) head

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

seinen hässlichen Kopf erheben, wieder auftauchen

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.
Die alte Rivalität zwischen den beiden Teams begann wieder ihren hässlichen Kopf zu erheben.
Whenever we discuss money, his true colors rear their ugly head.
Immer wenn wir über Geld sprechen, zeigt sich sein wahres Gesicht.