Bag Balm is a thick, petroleum-based ointment originally created in 1899 to soothe cracked cow udders during harsh Vermont winters. Over the past century, it has become a cult favorite for human skincare, used on everything from dry, cracked hands and feet to chapped lips and chafing. Its staying power comes from a simple formula: a heavy moisture barrier that seals skin and lets it heal.
What’s Actually in It
The formula is straightforward. The active ingredient is petrolatum at 84.3%, which is essentially a purified form of petroleum jelly. That high concentration is what gives Bag Balm its signature thick, waxy texture and its ability to create a near-impenetrable moisture barrier on skin. The inactive ingredients include lanolin (a natural fat derived from sheep’s wool), paraffin wax, purified water, and benzethonium chloride, which acts as a mild antiseptic.
Lanolin is the ingredient that sets Bag Balm apart from plain petroleum jelly. It closely mimics the oils your skin naturally produces, so it absorbs more readily and actively softens skin rather than just sitting on top of it. The combination of petrolatum sealing moisture in and lanolin conditioning the skin underneath is what makes the product effective for severely dry or cracked skin that regular lotions can’t touch.
Some older references to Bag Balm mention 8-hydroxyquinoline sulfate as an antiseptic ingredient. The current consumer label registered with the National Institutes of Health lists benzethonium chloride instead, so the formulation has been updated over the years.
Common Uses on Skin
Most people discover Bag Balm for one specific problem: painfully dry, cracked skin that won’t respond to regular moisturizers. The classic technique is to apply a thick layer to your hands or feet before bed, then cover them with cotton gloves or socks overnight. By morning, the skin is noticeably softer. This works because the petrolatum barrier prevents water loss for hours while the lanolin conditions the damaged skin underneath.
Beyond that core use, people apply it to chapped lips, cuticles, windburned cheeks, and minor skin irritation. Runners and hikers use it as an anti-chafing balm, applying it to heels, inner thighs, and armpits before heading out to reduce friction and prevent blisters. Tattoo artists recommend it for post-tattoo care, keeping fresh ink moisturized under a thin layer. Some people use it as a beauty product for taming eyebrows, smoothing flyaways, or adding a glossy sheen to cheekbones.
What Bag Balm is not designed for: open wounds, deep cuts, burns, or infected skin. It’s a skin protectant, not a medical treatment. The antiseptic in the formula is mild and meant for surface-level protection, not for managing active infections.
The Original Veterinary Purpose
A pharmacist in Wells River, Vermont, developed Bag Balm specifically for dairy cows. During long, freezing winters, cows’ udders would become dry, cracked, and painful, which made milking difficult and increased the risk of infection. The balm softened the skin and created a protective barrier against further chapping. Farmers noticed it worked just as well on their own rough, weather-beaten hands, and word spread.
The product is still widely used on animals today. It’s marketed for dry or cracked dog paw pads and noses, hot spots on pets, chicken combs and wattles, and livestock hooves. The pet-specific version contains no added fragrances, colors, alcohol, parabens, or phthalates. It is labeled for external use only, so if you’re using it on a dog’s paws, it’s worth covering the area or distracting your pet long enough for the balm to absorb so they don’t lick off a large amount.
Lanolin Sensitivity
The one ingredient to watch for is lanolin. While most people tolerate it well, lanolin allergy is more common than many realize. A large study from the North American Contact Dermatitis Group, covering data from 2001 to 2018, found that about 3.3% of people patch-tested had a positive allergic reaction to lanolin, with the rate climbing to nearly 4.6% in more recent years. Children showed slightly higher sensitivity (4.5%) than adults (3.2%).
If you’re allergic to lanolin, Bag Balm can cause contact dermatitis, typically showing up as redness, itching, or a rash on the hands, face, or in a scattered pattern across the body. People with a history of eczema or hay fever are more likely to react. If you’ve never used a lanolin-based product before, testing a small amount on the inside of your wrist and waiting 24 hours is a reasonable approach before slathering it on cracked hands or lips.
How It Compares to Other Balms
Bag Balm occupies a middle ground between plain petroleum jelly and specialty skin-repair creams. Pure petroleum jelly is cheaper and works well as a moisture barrier, but it lacks the skin-conditioning properties of lanolin. Specialty creams for cracked skin often contain ceramides or urea, which actively repair the skin barrier but cost significantly more and don’t provide the same heavy-duty sealing effect.
Bag Balm’s texture is thicker and greasier than most moisturizers, which is both its strength and its limitation. It’s excellent for overnight treatments or targeted application to problem areas like heels, knuckles, and elbows. It’s less practical as an all-over daytime moisturizer because it leaves a visible, greasy film. The product comes in tins ranging from a small 1-ounce size up to large pails designed for agricultural use, so you can match the size to how you plan to use it.