I worked at a Vet for 2 years as a Tech. Anal glands are the worst smelling thing tosh dog can produce. Dogs usually express their glands naturally when they take barking good poo. If you ever noticed your anal scooting like this, excessively, definitely take them to expressed vet to have them expressed.
How to Tell If Your Dog Needs His Anal Glands Expressed
Not only is it uncomfortable for the dog, they can become infected and glands turn into an abscess. Smaller dogs generally have more problems with their glands.
Dogs any grooming place will also express the dogs glands. They should do this included in the price, but not every place is the same. Ask your groomer if they can check the glands.
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Don't try and fight it. You'll get brain bubbles, strokes, aneurisms. You'll just wither up and die.