[Grammar] Any + singular/plural noun

Snappy said:

Which should I use, "any problem" or "any problems" in the following sentence?

(A friend of mine looks worried.)

If you have any problem/problems, please let me know.

I am confused with the use of "any" + a singular/plural noun.

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billmcd said:

Either is acceptable depending (again and as usual) on context.
"If you have any problem (e.g. in general or collectively with some issue)....."
"If you have any problems (e.g. multiple or a variety with anything)..."

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Snappy said:

Thanks.

Do you mean "any problem" sounds like "any kind of problem" while "any problems" sounds like "any number of problems"?

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