The phrase "surface problems" refers to issues or difficulties that are noticeable or visible on the outside, but do not go deep into the root cause or core of the problem. Full definition
It is clear that even near - the - surface problems often take serious and determined struggle to find a solution that is effective. (religion-online.org)
If your issues appear to be related to sleep surface problems keep an eye out for an email from us. (intellibed.com)