Although perhaps not the most unsightly finish, it isn’t what you want to see on a print you’ve waited hours for.
Signs of infill poking through the outline:
At a first glance, the blobs in the picture shown might look just like your standard blobs from improper extrusion. On a second look, you’ll notice that the blobs in this picture actually match with where the infill pattern meets up with the outside wall. This shows you’ve got infill poking through the outlines.
Explanation:
The blobs are usually a result of the retraction that is occurring at those points. You may also have to look at your outline settings.
How to fix:
Use more outlines to stop the infill poking through.
Tell your slicer to print the outlines before doing the infill.
As the blobs are usually a result of the retraction, optimising your retraction settings as well as calibrating basic extrusion parameters will help as well.
Reducing the infill overlap amount in your slicer will also help.