The phrase "underlying problem" refers to the main cause or issue that is causing other problems or difficulties. It is the root or basic issue that needs to be addressed in order to solve all the related problems. Full definition
What are the true underlying problems of the Spanish economy and, above all, what are the possible solutions to some of them? (blog.politics.ox.ac.uk)
Home inspection Getting a home inspection is a smart decision, because a qualified home inspector can identify underlying problems with a home's major systems, like heating and electrical. (jackieeagles.ca)
Of course, your first call should be to your veterinarian to look for underlying problems and assess the health and wellbeing of your dog. (mypetneedsthat.com)