Why the spot behind the ears mats first — and hurts most
The hair behind a dog's ears is fine, soft, and constantly rubbed by collars, ear flapping, and hands stroking her head, so it felts into tight mats faster than almost anywhere else on the body. The skin underneath is thin and loose, and it tents up into the mat as it tightens, which is why a mat that looks like a simple knot can hide skin pulled painfully into its base. That hidden skin is the reason scissors are dangerous here: it is easy to cut skin you cannot see while believing you are only cutting hair. Start by feeling the mat carefully. A loose mat that lifts away from the skin with space beneath it can usually be worked out at home. A mat plastered flat, warm, or smelly, or one your dog guards, is a different job entirely.
The hold-the-base technique, step by step
Settle her somewhere she is relaxed, with good light, and have treats ready. Work a little conditioner or detangling spray into the mat and let it soften for a few minutes. Then pinch the base of the mat firmly between your thumb and finger, as close to the skin as you can, so that all pulling is absorbed by your fingers and none reaches her skin. With your other hand, tease the outer edges of the mat apart with your fingers, splitting it into smaller strands, then work a wide-toothed comb or mat splitter through those strands from the tips toward your fingers — never from the skin outward. Split a big mat vertically into two or three thinner pieces first; thin pieces release far more easily than one dense lump. Work in short spells with treat breaks, and stop each session while she is still tolerating it well.
Tools that help and tools to keep away
Your safest tools here are fingers, a wide comb, and a mat-splitting tool designed to cut vertically through hair rather than across it. A slicker brush can finish the last loose tangle once the dense core is gone, but dragging a slicker through a solid mat just pulls skin. Keep pointed scissors away from this area entirely. If a mat must be cut out, the safe instrument is an electric clipper slid flat along the skin under the mat by someone experienced — the blade guards the skin in a way scissor points never can. Many owners reasonably hand exactly this job to a groomer, who removes ear mats daily and can do it in seconds.
The stop signals that mean groomer or vet
Stop home removal and book professional help if the mat is tight to the skin with no room for your fingers at its base, covers a large area behind both ears, or sits over skin that looks red, flaky, moist, or sore once partly opened. A dog who yelps, snaps, or cannot settle despite breaks is also telling you the mat is painful, and forcing it risks both a bite and skin torn by struggling. Mats that return within days despite regular brushing are worth mentioning at a vet visit, especially with scratching or head shaking, since itchy ears drive the rubbing that felts this hair so quickly. With the mat gone, run your fingers through the hair behind each ear for two minutes every few days so the next tangle never forms. If a fresh knot leaves you unsure whether to split or comb first, put a follow-up question to KinsLe's Kimmy; she answers using the KinsLe Answers library.