A few drops of castor oil in the belly button before bed is one of the biggest wellness trends online. Here’s what castor oil is, what people claim it does, what the research actually shows, and how to try it safely.

Putting castor oil in your belly button, or castor oil in the navel, means placing a few drops of castor oil in the navel, usually at bedtime, and gently massaging around it. Popular claims include better digestion, less bloating, easier periods, better sleep and glowing skin. The honest answer: there are no clinical trials of castor oil drops in the belly button. The closest research is one small study of warm castor oil packs on the abdomen for constipation. For most adults it’s low-risk if you patch-test first, but it isn’t for use in pregnancy, and many of the popular claims have no evidence behind them.

What is castor oil?

Castor oil is pressed from the seeds of the castor plant (Ricinus communis). About 90% of it is ricinoleic acid, an unusual fatty acid. When swallowed, castor oil is a strong, fast-acting laxative, because ricinoleic acid activates receptors on the muscle of the gut. It’s also widely used in skin care and cosmetics as a thick moisturizer. The toxic protein ricin stays in the leftover seed material, not in properly processed oil. You may also see it spelled “caster oil”; it’s the same thing.

How people use castor oil in the belly button

Navel drops: 2 to 3 drops in a clean, dry belly button at bedtime, with a minute of gentle massage around the navel.
Castor oil packs: a flannel cloth soaked in castor oil, laid over the abdomen, often covered with a heating pad for 30 to 60 minutes.
Castor oil belly button patches: small pre-soaked pads or stickers sold for the navel. They’re a convenience version of the drops, and they haven’t been tested either.

These are different practices. Most of the little research there is looks at packs, which add warmth, pressure and a larger skin area, not at a few drops in the navel. Navel oiling is part of a wider tradition; see Belly Button Therapy and Navel Oiling.

Benefits of castor oil in the belly button: claims vs evidence

Constipation and digestion: limited. This is the most common reason people try oil in the belly button for digestion. In a small 2011 study in a Turkish rest home, older adults with long-term constipation used castor oil packs on the abdomen for 3 days. Their stools became softer and easier to pass and their symptom scores improved, but the number of bowel movements didn’t change. The study was small, had no placebo pack and no blinding, so it can’t separate the oil from the warmth and rest. It also tested packs, not navel drops.
Bloating: no trials. Gentle belly massage may help some people feel more comfortable.
Period cramps: no trials of castor oil. Warmth on the lower belly does have trial support for cramps, which may be why a warm pack feels soothing.
Sleep and relaxation: anecdotal. A calm bedtime ritual may help on its own.
Glowing skin and acne: untested. Castor oil moisturizes skin where it’s applied, but there’s no evidence that oil in the navel changes the skin on your face.
Weight loss, “detox,” hormones and fertility: no evidence and no known way for it to work. There’s no credible route by which drops in the navel reach the liver, burn fat or change hormone levels.

Castor oil in navel benefits for women

Many posts aimed at women claim castor oil in the navel eases period cramps, regulates cycles, balances hormones, shrinks fibroids or cysts, or helps fertility. Here’s what’s actually known:

Period cramps: no trials of castor oil. Warmth on the lower belly does help some women, so a warm pack may feel soothing.
Irregular cycles and hormones: no evidence. Irregular periods have causes worth finding, such as PCOS (now called PMOS) or thyroid problems.
Fibroids, cysts and fertility: no evidence. These need a doctor’s assessment.
If you’re trying to conceive: avoid it, since castor oil can stimulate the uterus and its safety in early pregnancy isn’t established.

For cycle concerns, see How to Regulate Periods Naturally.

What about castor oil in belly button “before and after” photos?

They can’t show that castor oil caused a change. Belly size varies through the day with meals, bloating, posture and the menstrual cycle. Lighting, camera angle and clothing make a big difference too. And people who start a new habit often change other things at the same time, such as eating, sleep or exercise. Only a controlled study can show what the oil itself does, and none has been done.

Why it might still feel good

Moisture: the thick oil softens dry skin around the navel.
Touch: gentle belly massage can ease discomfort for some people.
Warmth if you use a pack with heat, which is the most likely reason packs feel soothing for cramps.
Ritual: a few quiet minutes before bed can be relaxing in itself.

Side effects and who should avoid it

Pregnancy, or trying to conceive: avoid. Swallowed castor oil can trigger contractions, and its safety on the skin in pregnancy hasn’t been established.
Skin reactions: castor oil can cause allergic contact dermatitis. Patch-test on your inner arm for 24 to 48 hours first, and stop if you notice redness, itching or a rash.
Broken or irritated skin, an infected navel, a piercing or a recent surgical scar: don’t apply it.
Don’t swallow it as part of this practice. Taken by mouth, it’s a strong laxative that can cause cramping, diarrhea and dehydration.
Children: ask a doctor first, and never use it on a baby’s healing umbilical cord.
Stains: castor oil marks clothing and sheets. Wear old clothes or cover the area.

And don’t let the trend delay a check: see a doctor for ongoing constipation, bloating, belly pain, changes in bowel habits or severe period pain.

How to try it safely

Choose plain, cold-pressed castor oil, without added fragrance or essential oils.
Patch-test on your inner arm first.
Clean and dry your navel.
Place 2 to 3 drops in the belly button and massage gently around it for a minute.
Wipe off any excess and wear old sleepwear.
Keep the navel clean the next morning.

A different navel method: the sealed herbal pouch

Castor oil drops are one way to use the navel. Traditional Chinese Medicine has used the navel, the acupoint Shenque, for external herbal care for centuries. The Five Essences herbal pouch, developed by Dr. Qingcai Wang in 2015, is a modern version: dried classical herbs sealed in a fabric pouch, worn over the navel with a reusable belt and replaced every five days. It’s dry, so there’s no oil, staining or mess, and nothing is swallowed.

It is not castor oil, and the research above doesn’t apply to it. Its own evidence is limited to practice records, not controlled trials. The pouches are complementary wellness products, not treatments for any disease. They aren’t used in pregnancy, and anyone with an ongoing condition should check with a clinician first.

How the herbal pouch works →

Quick answers

Does castor oil in the belly button help you lose weight?
No. There’s no evidence and no known way for it to burn fat.

Does castor oil in the belly button help you sleep?
It hasn’t been tested. A calm bedtime ritual and gentle massage may help you relax, but there’s no evidence the oil itself improves sleep.

Can I put castor oil in my belly button every night?
If your skin tolerates it, nightly use is generally fine for adults who aren’t pregnant. Stop if you notice irritation.

How long does castor oil in the belly button take to work?
There’s no evidence-based timeline, because the practice hasn’t been tested in trials.

Reviewed October 2026. Author: Qingcai Wang, MD, PhD, developer of the Five Essences external herbal-pouch formulations, with a commercial interest in their sale. General education only; continue your medical care.

Sources: Arslan GG, Eşer I. An examination of the effect of castor oil packs on constipation in the elderly. Complementary Therapies in Clinical Practice (2011); Healthline, Castor oil packs.

Explore the herbal pouches

Every Five Essences pouch is worn over the navel, nothing swallowed, with a fresh pouch every five days. Each first course is covered by the 90-Day First-Course Satisfaction Guarantee.

→ Shop the pouches

Wellness support, not medical care.

This article is part of our Women’s Core Health guide — cycle, fertility and postpartum, in one place.

Castor Oil in Belly Button: Benefits, Evidence and Risks