Few things stop a couch-petting session faster than your hand catching on a bump that wasn't there before. It happens to almost every dog owner eventually — usually during an ordinary moment, a belly rub or a bath or a brush-out — and the first reaction is almost always the same mix of “what is that?” and “how long has that been there?” So here's a practical guide: how to check your dog at home, what lumps and bumps usually turn out to be, and the signs that mean it's time to call your vet instead of watching and waiting.
How to Give Your Dog a Nose-to-Tail Check at Home
VCA Animal Hospitals recommends owners give their dog a regular hands-on check at home: run your hands slowly over the head and neck, down the back, along the belly, and over each leg, feeling for anything that wasn't there before. Don't skip the spots that don't get much day-to-day attention — under the legs, behind the ears, along the chest, between the toes. You're not trying to diagnose anything; you're just building a mental map of what's normal for your dog, so anything new actually registers as new. The easiest way to make it stick is to fold it into something you already do — a weekly brush-out session covers most of the same ground.
What Lumps and Bumps Usually Are
Here's the reassuring part. According to the American Kennel Club, lumps and bumps are common in dogs — especially as they move into their middle-age and senior years — and many of the kinds owners find most often, like soft, slow-growing, moveable fatty lumps and simple cysts, turn out to be entirely benign. That said, common and harmless aren't the same thing as guaranteed. There's no way to know what a lump is by feel alone — not for an owner, and not for a groomer either. That takes a vet, often with testing like a fine needle aspirate or biopsy. Which is why the sensible habit is simple: every new lump gets noted, and every new lump gets mentioned to your vet rather than guessed at.
When to Call the Vet Sooner Rather Than Later
Most new lumps can wait for a regular appointment. But some changes are worth a prompt call rather than a wait-and-see approach: a lump that's growing quickly, one that's changed shape, color, or texture, one that feels hard or fixed to the tissue underneath, or anything that's oozing, bleeding, or clearly bothering your dog. When you do call, specifics help — roughly where the lump is, how big it feels, and whether it's changed since you first found it. That's far more useful to a vet than “there's a bump somewhere on his side.”
Why Coat Type Makes This Harder
A lump you'd spot at a glance on a Weimaraner can hide for months under a thick double coat or a Doodle's dense curls — and a matted coat hides skin problems better than almost anything else, something we've written about in our post on why Doodles mat so fast in Missouri humidity. That's one quiet argument for keeping a heavily coated dog brushed out on a regular schedule: a brush-out that reaches the skin doubles as a skin check, whether you're doing it on the living room floor or it's happening as part of a groom. Age matters too — since lumps get more common as dogs get older, those hands-on checks earn their keep most with senior dogs, which we talk more about in our post on grooming senior dogs in St. Charles.
Where Grooming Fits In
A full groom — bath, blow-dry, brush-out, trim — naturally involves hands going over most of a dog's body, so grooming appointments are one of the moments when a new lump or skin change is likely to get noticed. Two things are worth knowing here. First: if you've found a lump yourself, mention it at drop-off. Knowing it's there means it can be worked around gently, and it saves the mystery of whether it's new. Second: if we notice something during a groom, we'll tell you what we see — where it is and roughly how it feels — so you have something specific to bring to your vet. What it actually is is always your vet's call, not ours; groomers don't diagnose, and you should be wary of any who do.
If your dog is due for a groom — or overdue for a good brush-out down to the skin — we'd love to see you. Book an appointment here in St. Charles and we'll take good care of the coat, and of the dog underneath it.
Frequently Asked Questions
How often should I check my dog for lumps and bumps?
VCA Animal Hospitals recommends a regular nose-to-tail check at home — hands over the head, neck, back, belly, legs, and paws. There's no strict schedule; the easiest habit is folding it into something you already do regularly, like a weekly brush-out.
Are most lumps on dogs serious?
Not usually. According to the American Kennel Club, lumps and bumps are common, especially in middle-aged and senior dogs, and many of the most frequent kinds — soft fatty lumps and simple cysts — are benign. Even so, no one can tell what a lump is by feel, so every new one is worth a vet's look.
Can a groomer tell me what a lump is?
No — diagnosing a lump takes a vet, often with testing like a fine needle aspirate or biopsy. What a groomer can usefully do is tell you what they noticed and where, which gives you something specific to bring to your vet.
What should make me get a lump checked right away?
A lump that's grown quickly, changed shape, color, or texture, feels hard or fixed to the tissue underneath, or is oozing, bleeding, or bothering your dog is worth a prompt vet visit rather than a wait-and-see approach.
Is it harder to notice lumps on a heavily coated dog?
Yes. A thick double coat, dense curls, or matting can hide skin changes that would be obvious on a short-haired dog. Regular brush-outs that reach the skin — at home or at the salon — make changes much more likely to get seen.
Should I tell my groomer about a lump I found?
Yes, please — mention it at drop-off. It means the area can be handled gently and worked around, and it avoids any confusion about whether the lump is new. For what the lump actually is, your vet is the right person to ask.