What does it mean when a dog wipes the floor with its butt?

This is a sign of itching or discomfort in the dog's body or buttocks. Please check carefully around the buttocks to confirm whether there is any redness or swelling. The most common causes are anal-related problems such as inflammation or perianal gland swelling. In order to avoid this kind of situation, please clean your dog’s butt frequently.
If the dog is also accompanied by symptoms of stretching its hind legs forward and dragging its legs when walking, it may be suffering from: 1. Strip worms 2. Perianal adenitis 3. Perianal gland tumors. Check if there are any abnormalities around the anus, the state of the stool, and if there is any odor or other symptoms in the buttocks.

How to clean dog’s anal glands

Always keep the buttocks clean:The anus is a very sensitive part. Especially when it is easy to get dirty, such as diarrhea, you need to check more frequently and wipe it gently with wet tissue.
Trim long hair: For dogs with longer tails or longer hair, the hair around the anus is prone to dirt, making the buttocks unclean. Please trim the hair around the anus to keep your dog’s butt clean.
Squeeze the perianal glands: Pull the tail upward, center on the anus, and place your fingers near the points. If there is secretion accumulated in the perianal glands, you will feel a lump when you touch it. Cover it with toilet paper first, and then squeeze out the secretion toward the anal opening. Because the secretion has a strong smell, please wear gloves when performing the procedure.
Perianal glands: These are secretory glands located to the left and right of the anus. Usually when dogs defecate, the secretions of their perianal glands are also discharged together. However, small dogs kept indoors may experience discomfort in their buttocks because their perianal glands tend to accumulate secretions.