Skin Marker Pen

A skin marker is a fine-tip pen made for writing on skin, for a small dot beside today's injection site so rotating sites needs no chart. The mark lasts a day or two and washes off with soap.

Last edited · written by PepPrep

  • Fine tip
  • Skin-safe ink
  • Washes off

What it’s for

A small dot where today's injection went takes the guesswork out of rotating sites, without a chart on the wall.

What to check in the listing

Look for one sold as a surgical or skin marker, not a craft pen; the ink is made for skin and comes off in a wash or two. A single pen lasts months. Mark beside the site, not on it, so nothing is on the skin you are about to clean.

At a glance

TypeLabels
Used forTracking, Under-the-skin injectionsUsed for lists the situations this product is for; the decision tool and the Finder match on these.
PriceBudgetPrice tier is the rough position within its category, not a live price: budget is the cheapest sensible option, premium costs more for a reason the page explains.
TravelCarry-on friendlyTravel says whether it is practical to fly with: carry-on means it goes through security without fuss.
SterileNoSterile means individually sealed and sterile until opened; anything that touches the inside of a vial or your skin should be.
Pack6Pack is how many come in the listing this site links to; it is shown only where every store's listing gives the same count. Check it against the listing, since photos often show ten and ship one.
ReusableYes

Specifications above were recorded from the Amazon listing on 2026-09-03. Listings change hands: open the listing for its current description, price and availability.

For getting a number right rather than close enough, read Measuring accurately — units, bubbles and dead space.

Category
Measuring & Tracking
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Read before you buy

Measuring accurately — units, bubbles and dead spaceGuide
Insulin syringe units to mL: conversion chartGuide
Blood tests: what people track, and where to actually get themGuide