I Put Mustard Oil on My Edges Every Day for 4 Weeks

By the Edge Naturale Editorial Team · Medically reviewed by Shelia Davis, Edge Naturale Medical Team · Last updated June 2026

Quick answer: Mustard oil may help improve scalp circulation and has some antifungal properties, but the evidence for edge regrowth is limited and the smell is intense. Whether it works depends on why your edges are thinning in the first place. Here's what four weeks of daily use actually looked like.

Why I Even Started Putting Mustard Oil on My Edges

My edges had been thinning for about two years. A long run of knotless braids, a wig addiction, and one bad lace glue situation left my hairline looking sparse in places I used to take for granted. I tried the fancy serums. I tried the castor oil. My cousin kept sending me videos about mustard oil and I kept ignoring them.

Then I looked at my hairline in a parking lot mirror in full afternoon sunlight and decided I had nothing to lose.

I want to be clear about one thing before we get into this: I am not a dermatologist. I'm someone who did a lot of reading, asked a lot of questions, and documented what happened to my own head. If your hair loss is significant or sudden, please see a board-certified dermatologist before you start experimenting.

What Does Mustard Oil Actually Do for Hair?

Mustard oil comes from pressed mustard seeds and has been used in Ayurvedic hair care for centuries, particularly in South Asian households. It contains erucic acid, omega-3 fatty acids, and compounds with known antifungal and antibacterial properties.

The circulation argument is the most credible one. Mustard oil creates a warming sensation on the scalp, which may increase local blood flow to the follicle. Better circulation means better delivery of oxygen and nutrients to hair follicles that may be in a dormant phase rather than a fully dead one. Whether that warming sensation translates to measurable regrowth is a different question, and honest answer is: we don't have strong clinical data specific to edges.

What the American Academy of Dermatology does confirm is that traction alopecia, the type most common in Black women from braids, wigs, and tight styles, is reversible in its early stages if the tension is removed and the follicle is supported. That's the window mustard oil is trying to work in.

My Week-by-Week Timeline

Week 1: The Smell Is No Joke

I applied a small amount of cold-pressed mustard oil to my edges every night before bed using a soft toothbrush to massage it in. I covered my hair with a satin scarf. My partner had opinions. The smell is sharp, pungent, and persistent. By day three I had switched to morning application only, giving it thirty minutes to absorb before I styled.

I noticed no visible change in week one. My scalp did feel warmer during the massage, which I took as a sign of increased circulation. My edges looked exactly the same. I took photos under the same lighting every Sunday morning so I wasn't relying on memory.

Week 2: Scalp Changes Before Hair Changes

My scalp felt less dry and flaky by the end of week two. I had some buildup along my hairline that I was clearing with a gentle cleanse twice a week. The follicles around my temples looked slightly less flat to me, but I was probably searching for something to see. No new growth visible yet.

I did start pairing the mustard oil with a two-minute scalp massage each time. Massage alone has actual research behind it. A small 2016 study published in ePlasty found that standardized scalp massage over 24 weeks increased hair thickness in participants. The massage matters as much as what you put on.

Week 3: Something Shifted

Week three is when I started to feel cautiously optimistic. Looking at my Week 1 photo next to my Week 3 photo, a few small baby hairs appeared along my left temple, the side that had been thinner. They were fine and short, the kind you can only see in good light. I don't know with certainty that mustard oil caused them. I had also stopped wearing my wig unit five days a week, which matters enormously.

This is the honest part: isolating one variable in a hair experiment on yourself is basically impossible. I changed two things at once.

Week 4: Where I Landed

By the end of four weeks, my edges looked better than they did at the start. The baby hairs along my temple had stayed. My hairline looked slightly denser. I still had sparse areas near my nape that hadn't changed. My scalp overall felt healthier.

Was it the mustard oil alone? I genuinely doubt it. Removing tension from my hairline, consistent scalp massage, and switching to a more nourishing routine all played a role. Mustard oil was one piece of a system, not a miracle.

How to Use Mustard Oil on Your Edges Safely

• Do a patch test first. Apply a small amount to your inner arm and wait 24 hours. Mustard oil can cause irritation or allergic reaction in some people.
• Use cold-pressed, unrefined mustard oil. Refined versions lose some of the active compounds.
• Apply a pea-sized amount. You don't need much and more will just increase buildup.
• Massage for at least 90 seconds using your fingertips or a soft brush. The massage does real work.
• Use at night if the smell doesn't bother your household, or apply 30 minutes before styling.
• Cleanse your scalp at least twice a week to prevent buildup at the follicle opening.

What to Use Alongside It

Mustard oil works best as part of a fuller edge care routine. After I added the Follicle Enhancer from Edge Naturale into my morning routine, I found the peppermint gave me a similar circulation-stimulating warmth without the heavy smell, and the argan and jojoba kept the area moisturized through the day. I used mustard oil at night and the Follicle Enhancer in the morning. That combination felt more sustainable long term.

When Mustard Oil Probably Won't Help

If your edges have been gone for years and the skin along your hairline looks shiny and smooth, that may indicate scarring alopecia, where follicles have been permanently damaged. Mustard oil, castor oil, or any topical product cannot reverse follicle scarring. That requires a dermatologist, not a kitchen remedy.

Similarly, if your hair loss is coming from a hormonal cause, a thyroid condition, or a nutritional deficiency, no oil will address the root cause. Get bloodwork done. It's one of the most useful things you can do for your hair and most people skip it.

Mustard Oil vs. Other Popular Edge Oils

None of these oils are equal and none of them do the same thing. Your edges may need more than one thing at different times.