Arnica and Bromelain After Surgery: What the Evidence Shows for Bruising and Swelling

Key Takeaways

• The evidence for both is limited and mixed. One facelift trial and some rhinoplasty trials found less bruising on some days with arnica, while eyelid surgery trials found no difference.
• Bromelain, a group of enzymes from the pineapple plant, reduced swelling after wisdom tooth surgery in a pooled analysis, and reduced bruising at one week in one small rhinoplasty trial. There’s much less evidence after cosmetic facial surgery.
• Homeopathic arnica tablets are diluted so heavily that little or none of the plant remains. Herbal arnica taken by mouth can be toxic, and arnica creams shouldn’t go on broken skin or incisions.
• Bromelain can affect blood clotting, so I ask patients to stop it two weeks before surgery. Patients who’d like to try these products can start bromelain 48 hours after surgery, and homeopathic arnica tablets on the second day after surgery.
• Careful surgery, no nicotine and stopping blood-thinning supplements matter more than either product, along with common-sense measures such as keeping your head raised.

Arnica and bromelain come up in almost every facial surgery consultation. Bruising is often what keeps people at home after a facelift, rhinoplasty, brow lift or eyelid surgery, so anything that might shorten it is appealing.

In this article I explain what the two products are, what the trials found, how safe they are, and how I approach them with patients.

I’m Dr Scott J Turner, a Specialist Plastic Surgeon (FRACS). This is general information, so check with your own surgeon before taking either.

Why bruising and swelling happen

Facial surgery works close to many small blood vessels. Some leak a little blood into the surrounding tissue, which shows as a bruise, and fluid gathers as the tissues heal, which shows as swelling. After a facelift, both usually peak around 48 to 72 hours, and visible bruising fades over about two to three weeks. I explain what’s normal, and the warning signs, in bruising and swelling after a facelift.

What arnica and bromelain are

They’re two quite different products, often mentioned together.

Arnica comes from Arnica montana, a mountain flower in the daisy family. It’s sold in two main forms:

• Homeopathic tablets or pillules, diluted so heavily that little or none of the original plant remains. These are the oral form used in surgical trials.
• Creams, gels and ointments for the skin, which contain measurable amounts of arnica.

Herbal arnica extracts, teas and tinctures taken by mouth are a different thing, and they can cause serious poisoning.

Bromelain is a group of enzymes from the pineapple plant, mainly the stem, taken as capsules or tablets at a measurable dose. It’s thought to break down proteins involved in swelling, and it appears to increase the breakdown of blood clots, which is why its timing around surgery matters.

What the evidence shows

The trials are small, use different products and doses, and measure bruising in different ways, so they’re hard to combine. Here are the main ones in facial surgery:

Reviews of these and other trials reach cautious conclusions:

• A 2016 review of 20 trials across cosmetic, laser and surgical skin procedures found mixed results: 4 of 13 arnica trials and 5 of 7 bromelain trials reported a benefit. It concluded there wasn’t enough evidence to support either product after procedures.
• A 2025 review of 29 randomised trials of measures to reduce bruising and swelling in eyelid surgery found no significant benefit from arnica or bromelain. A medicine that reduces bleeding was the most consistently effective.
• A 2026 review of 10 studies in facial plastic surgery, 6 of them randomised and most of them in rhinoplasty, concluded that arnica may help reduce bruising and swelling, but that the evidence for bromelain is limited. It noted that differences in dosing and measurement make the results hard to generalise.
• For bromelain after lower wisdom tooth surgery, a pooled analysis of 6 trials found less swelling at two to three days and at one week, and less pain at one week.

There’s a further question with homeopathic arnica. In 2015 Australia’s National Health and Medical Research Council reviewed the evidence on homeopathy and concluded there’s no reliable evidence that it’s effective for any health condition. That’s worth keeping in mind when weighing small trials with mixed results.

Are they safe?

Arnica:

• Herbal arnica taken by mouth can cause vomiting, a fast heart rate, bleeding problems and organ damage. Only take arnica by mouth as a homeopathic product, and check the label with your pharmacist if you’re unsure.
• Homeopathic tablets are generally considered safe because they’re so diluted.
• Arnica creams and gels shouldn’t go on broken skin, so keep them away from incisions.
• Arnica can cause skin allergy, especially in people allergic to other plants in the daisy family, such as chamomile, marigold or sunflower.
• If you’re pregnant, breastfeeding or take a blood thinner, check with your doctor before using any arnica product.

Bromelain:

• Stomach upset and diarrhoea are the most common side effects.
• It can affect clotting, so it isn’t taken before surgery, and it may interact with blood thinners.
• People allergic to pineapple shouldn’t take it.
• Little is known about its safety in pregnancy or breastfeeding.

How I approach arnica and bromelain

Patients are welcome to use them, provided we’ve discussed it. This applies after facelift, rhinoplasty, brow lift and eyelid surgery, although trials in eyelid surgery found no benefit:

• Arnica tablets. If you’d like to take homeopathic arnica, I recommend starting on the second day after surgery.
• Arnica cream or gel. These can be used on unbroken skin, away from the incisions.
• Bromelain. Stop it two weeks before surgery, and if you’d like to take it afterwards, start 48 hours after surgery. Don’t take it with blood thinners.
• Taking them together is fine within those limits. There’s no known interaction between them.

Some patients feel these products help. What I won’t do is promise they will, because the evidence doesn’t allow it. Treat them as an optional extra, not a substitute for the basics.

Bromelain isn’t the only supplement that matters around surgery. Others that can affect bleeding are stopped two weeks before, which I cover in how to prepare for plastic surgery.

What does more for bruising and swelling

The measures that matter most aren’t supplements, although some, such as keeping your head raised, rest on common sense rather than trials:

• Careful surgery and bleeding control. How the operation is done, and how bleeding and blood pressure are controlled during and after it, matter more than anything taken at home.
• Keeping your head raised, including while you sleep, for the first two weeks.
• No nicotine in any form, including vapes, pouches, patches and gum, for at least six weeks before surgery (ideally eight) and at least six weeks after. I explain why in smoking, vaping and nicotine before plastic surgery.
• Stopping blood-thinning supplements and anti-inflammatories before surgery, as instructed.
• Rest, and no heavy lifting, bending or strenuous exercise in the early weeks.

Cold packs are popular, but the evidence is weaker than most people expect. In a 2015 trial of 38 people having upper eyelid surgery, cooling eased pain slightly the day after surgery, a difference the authors judged too small to matter, and didn’t change swelling or bruising. If cold feels good in the first two or three days, wrap the pack in a cloth, rest it gently over any dressing for 10 to 15 minutes at a time, and never put ice straight on the skin. Take extra care where the skin is numb, because it can’t tell you when it’s getting too cold.

If you’d like to talk through recovery planning for your own surgery, you can contact the practice.

Frequently asked questions

Does arnica help with bruising after surgery?

The evidence is mixed. One facelift trial and some small rhinoplasty trials found less bruising on some days, while trials after eyelid surgery found no difference. A 2026 review concluded that arnica may help reduce bruising after facial plastic surgery, but the studies are small and inconsistent. Homeopathic arnica is generally safe, so some patients try it, but it shouldn’t be relied on.

Which arnica is best after surgery?

No form has been shown to be clearly better. The oral form used in surgical trials is homeopathic tablets, and if you’d like to take them, I recommend starting on the second day after surgery. Creams and gels can be used on unbroken skin away from the incisions. Never take herbal arnica extracts, teas or tinctures by mouth, because they can be toxic. If you’re unsure what a product contains, ask your pharmacist, and tell your surgeon what you’re using.

Can I take arnica and bromelain together?

Yes, within limits, and with your surgeon’s agreement. I’m happy for patients to start homeopathic arnica tablets on the second day after surgery, and bromelain 48 hours after surgery. Bromelain can affect clotting, so it’s stopped two weeks before surgery and isn’t taken with blood thinners. There’s no known interaction between the two.

Can I take arnica or bromelain before surgery?

I don’t recommend either before surgery. If you’d like to take homeopathic arnica tablets, I recommend starting on the second day after surgery. Bromelain can affect clotting and increase the risk of bleeding, so stop it, along with other supplements that can affect bleeding, two weeks before your operation. If you’d like to take it afterwards, start 48 hours after surgery.

Does bromelain help with bruising and swelling?

Possibly. A pooled analysis of lower wisdom tooth surgery trials found less swelling, and a small rhinoplasty trial found less bruising at one week, but no difference in swelling. Reviews of facial cosmetic surgery describe the evidence as limited. If you’d like to try it, I recommend starting 48 hours after surgery, not before, because it can affect clotting.