Is it normal to smell under your toenails?
Mostly.Normal for most people
Yes, a mild smell under your toenails can happen when sweat, skin, and debris get trapped there. A strong or persistent odor—especially with thick, discolored, or crumbling nails—is worth getting checked.
A little odor can come from sweat and bits of skin or lint collecting under your nails, especially if your feet stay warm or damp. Lots of people notice it now and then; it doesn’t automatically mean anything is wrong.
Wash your feet, gently clean under the nail edges, dry well, and keep your nails trimmed. If the smell sticks around or comes with nail changes, it could be a fungal infection, so consider having it checked.