A tick on a dog usually looks like a small, round or oval bump that’s attached to the skin, often brown, black, gray, or pinkish. Before it feeds, it can be tiny like a pinhead; after feeding, it may swell to the size of a small pea and look like a shiny, raised lump.

What to look for

  • Shape: round or oval, slightly flattened at first.
  • Color: brown, black, pink, purple, or bluish-gray depending on how full it is.
  • Legs: if you look closely, you may spot eight legs near the head.
  • Common confusion: it can look like a skin tag, lump, or nipple, especially when it’s small or engorged.

Where they hide

Ticks often show up around the ears, neck, face, feet, under the tail, and in the belly or leg creases. They’re easier to find if you part the fur and feel for a small raised bump while checking your dog after walks in grass or brush.

When to act

If you find one, remove it carefully or have a vet do it, because ticks can carry diseases. If the spot looks red, swollen, or your dog seems unwell afterward, a vet visit is a good idea.

Quick visual clue

A simple rule: tiny dark bump with legs near the skin = likely tick ; smooth skin-colored bump with no legs = maybe something else.

Information gathered from public web sources and summarized here.