Grammar fix

real problem

actual issue

A situation or difficulty that truly exists and needs attention, not just something minor or imagined.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

Finding affordable housing is a real problem in many big cities.daily life
In my opinion, the real problem with public transport is that it doesn't run late enough for people who work night shifts.IELTS speaking

Pattern: a real problem; the real problem (with/for/of something)

WrongIt's a really problem.

RightIt's a real problem.

'Real' (adjective) goes before the noun; 'really' is the adverb.

Patterna real problem; the real problem (with/for/of something)

Choose the version that sounds natural in speech.

Stiff The genuine and substantive difficulty lies elsewhere.

Natural The real problem is somewhere else.

'Genuine and substantive difficulty' is wordy; 'the real problem' is natural.

Words that usually travel with it.

a real problem
a real problemthe real problem isa real issuecause real problems

'Real problem' is stronger than just 'problem'—it means the issue is important or truly exists.