皮膚科

Causes and Correct Treatments for Infected and Puss-Filled Piercings

ピアスホールは皮膚を貫通した「傷」で、耳たぶなら1〜2ヶ月、軟骨なら3〜6ヶ月かけて完成するまでの間、細菌感染のリスクが続きます。透明なリンパ液なら心配ありませんが、白〜黄緑色の膿や強い痛み・熱感がある場合は化膿のサインです。このページでは、軽度の炎症と化膿の見分け方から、部位別(軟骨・へそ・ファーストピアス)の対処法、何科を受診すべきかまで詳しく解説します。

  • リンパ液(透明でさらさら)と膿(白〜黄緑色で粘り気)は見た目で見分けられる
  • 軟骨ピアスは耳たぶより血流が少なく、悪化・重症化しやすいため早めの受診が重要
  • 無理に膿を絞り出す、消毒液を頻用するなどのNG対処が悪化の原因になりやすい
  • 軽度なら自宅ケアで改善するが、3日以上改善しない・悪化する場合は皮膚科受診が必要
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Available daily from 9:00 AM to 10:00 PM
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5-minute walk from the station
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A clean clinic with a white-based interior
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Online consultations: same-day shipping at the earliest
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Cosmetics and supplements sold exclusively at medical institutions are also available for purchase.

What are earring pus and infection?

Earring pus and infection occur when bacteria enter the piercing hole and cause an infection. A piercing hole is a "wound" that penetrates the skin, and the risk of bacterial infection continues until it is completely stable (healed). It typically takes 1 to 2 months for earlobes and 3 to 6 months for ear cartilage to heal.

Difference between mild inflammation and suppuration

Mild inflammation is a common reaction that can occur immediately after getting a piercing or changing jewelry. If there is only redness, slight swelling, and a small amount of clear to yellowish discharge, it should improve within a few days with proper care.

Suppuration (bacterial infection) occurs when bacteria (such as Staphylococcus aureus and Streptococcus) multiply in the piercing hole, causing symptoms like white to yellowish-green pus, severe pain, heat, redness, and swelling. If left untreated, the infection can spread to deeper cartilage and subcutaneous tissue, potentially leading to serious infections such as chondritis or cellulitis.

Please see a dermatologist promptly if any of the following apply:

  • Continuous white, yellow, or green pus discharge
  • Throbbing pain or heat around the piercing
  • Spreading swelling or a hard lump
  • Systemic symptoms such as fever, chills, or swollen lymph nodes
  • Severe pain or bleeding when moving the earring
  • No improvement or worsening after more than a week of care
  • Severe swelling or pain in ear cartilage or body piercing areas
  • Trouble after self-piercing

Causes of piercing infection

A piercing hole is a wound in the skin. During the period until the wound is completely stable (the initial piercing period), it is particularly susceptible to bacterial infection.

Bacterial infection

Bacteria such as Staphylococcus aureus can enter the piercing hole, causing inflammation and suppuration. This can be caused by touching with dirty hands, using unsanitary earrings, or insufficient cleaning.

Metal allergy

This is common with earrings made of materials containing nickel, cobalt, or chromium. Metal components ionized by sweat combine with proteins in the skin, causing an allergic reaction that leads to inflammation and then secondary infection with pus. Changing to titanium, pure gold, or surgical stainless steel is effective.

Excessive disinfection/irritation

If disinfectant is used too frequently in an attempt to keep it "clean," it can kill even the normal skin flora, actually delaying healing. Excessive use of alcohol-based disinfectants is counterproductive.

Over-tightening the earring back

If the earring back is tightened too much, blood flow can be impaired, leading to tissue necrosis and an increased risk of infection. Allow a 1-2mm gap between the earring and your earlobe.

Weakened immune system

Lack of sleep, fatigue, and poor health can lower immunity, making one more susceptible to infections from bacteria that would normally not cause problems.

Distinguishing between mild inflammation and suppuration (bacterial infection)

Item Mild Inflammation Suppuration (Bacterial Infection)
Color of discharge Clear to faint yellow (lymph fluid) White, yellow, or green pus
Amount of discharge Small amount, forms a scab Continuous, recurs even after wiping
Pain Slight pain when touched Throbbing pain
Swelling Mild, only around the piercing Spreads widely, hard lump
Heat Almost none Clearly hot to the touch
Time to improvement 2-5 days with care Requires medical consultation and treatment
Action Continue cleaning and care at home Consult a dermatologist promptly

Distinguishing between lymph fluid and pus

Not all liquid discharged from a piercing hole is "pus."

Liquid Color/Characteristics Meaning
Lymph fluid Clear to pale yellow, watery Normal healing process. No problem
Pus White to yellow/green, viscous Sign of bacterial infection
Blood-tinged fluid Red to pink Small amount is normal. Large/continuous amount requires caution

Clear, watery fluid is often lymph fluid and is part of the normal healing process. If it is cloudy, yellowish-green, or viscous, it may indicate an infection.

Classification of infection severity

Category Condition Main Symptoms Treatment Guideline
Mild Shallow infection on the hole's surface Small amount of pus, mild swelling, pain when pressed Topical antibiotics, cleaning instructions for 1-2 weeks
Moderate Infection of surrounding piercing tissue Pus, severe swelling, heat, throbbing pain Oral antibiotics + topical for 2-3 weeks
Severe Chondritis, cellulitis, abscess formation Widespread swelling, fever, swollen lymph nodes, accumulation of pus Oral + incision and drainage, rarely IV treatment

Correct actions when a piercing is infected

Mild (small amount of white pus, slight redness around it)

  1. Do not remove the earring: If removed during the initial piercing period, the hole may close.
  2. Clean with shower: Lather a mild soap well and gently apply it to the earring post to clean.
  3. Rinse shampoo/conditioner thoroughly: Residual oil can be a breeding ground for infection.
  4. Minimize disinfectant: Avoid alcohol; if used, use saline solution or a specialized gel.
  5. Avoid excessive touching: Cleaning once or twice a day is sufficient.

Moderate (swelling, pain, yellow to green pus)

Apply a small amount of over-the-counter antibiotic ointment (such as Terramycin or Dormycin) to the affected area. If it doesn't improve within 2-3 days, see a dermatologist.

Things NOT to do

NG Action Reason
Forcibly squeezing out pus Pushes bacteria deeper, worsening the condition
Frequent alcohol disinfection Damages normal tissue and hinders healing
Twisting the earring Repeatedly damages healing tissue
Excessive use of over-the-counter Makiron (disinfectant) Too irritating, also kills beneficial skin flora
Swimming in a pool while infected Worsens condition with double irritation from bacteria and chlorine

Treatment by piercing location

If a cartilage piercing is infected

Cartilage areas of the ear (helix, tragus, industrial, etc.) have less blood flow compared to the earlobe, making them harder to heal when an infection occurs. If a cartilage piercing is infected, it is more likely to become severe than an earlobe piercing, so we strongly recommend seeing a dermatologist promptly.

Item Content
Difference from earlobe Less blood flow, harder to heal. Can develop into chondritis or cartilage necrosis if severe.
When to see a doctor See a doctor immediately if swelling spreads, heat, or throbbing pain occurs.
Treatment policy Oral antibiotics are standard. Incision and drainage or IV treatment for severe cases.
Important note Leaving it untreated with "it will heal naturally" is the most dangerous. Cartilage necrosis is irreversible.

If a belly button piercing is infected

Belly button piercings are susceptible to friction from clothing, sweat, body movements, and bacteria-rich environments (pools, dirt, etc.), making them a high-risk area for infection.

Item Content
Reason for high infection risk Frequent irritation from clothing friction, sweat, and body movements. Takes 6 months to 1 year to heal.
When to see a doctor See a doctor promptly if pus continues, redness spreads widely, or fever occurs.
Daily care Choose breathable clothing, avoid pressure, thorough cleaning after bathing.
Important note Removing the earring can cause the hole to close, trapping pus inside and worsening the condition.

If a first piercing is infected

A first piercing is an earring worn continuously from immediately after piercing until the hole is healed. During this period, the piercing hole is still a "wound" and is at the highest risk of infection.

  • Clear to faint yellowish discharge (lymph fluid) is a normal healing process.
  • White, yellow, or green pus, severe pain, or heat are signs of infection.
  • Do not remove the first piercing on your own.
  • Do not use alcohol disinfectants or hydrogen peroxide.
  • Gentle cleaning with soap and lukewarm water is the basic care.
  • If care for 3 days doesn't improve the condition or it worsens, see a dermatologist.

Piercing Granuloma

What is a granuloma?

A granuloma is a red to pinkish raised area (granulomatous tissue) that forms around a piercing hole. It is a condition where the body overreacts to foreign body irritation (the piercing) and attempts to repair it, causing tissue to proliferate. This is different from suppuration caused by bacterial infection.

How to distinguish from pus (suppuration)

Comparison Item Granuloma Suppuration (Bacterial Infection)
Appearance A red to pinkish bump with a smooth surface. White, yellow, or green pus. Accompanied by swelling and redness.
Pain Slight pain when touched. Dull pain when pressed. Throbbing pain and warmth.
Discharge Clear to light red exudate (lymphatic fluid). White to yellow pus.
Cause Physical irritation, allergy, piercing material, size. Bacterial infection (e.g., Staphylococcus aureus).

How to treat granulomas

Treatment Details
Change piercing material Replace with materials less likely to cause metal allergies, such as titanium, surgical stainless steel, or 14K gold or higher.
Check piercing size If the inner diameter is too short, pressure on the skin can cause granulomas. Change to a piercing with the correct gauge and inner diameter.
Avoid pressure and irritation Avoid headphones, mask straps, and pressure during sleep.
Soap cleansing Gently wash 1-2 times a day with mild soap.
Consult a dermatologist If it does not improve, gets larger, or if you have a keloid tendency, topical steroids or injections by a dermatologist are effective.

Granulomas and keloids are different. Granulomas often improve if the cause is removed, but keloids require specific treatment. If it continues to grow, is hard, or painful, please consult a dermatologist.

Self-care at home

For mild inflammation, the following self-care may help, but if it doesn't improve after 3 days or worsens, be sure to consult a dermatologist.

  • Wash 1-2 times a day: Gently wash with lathered soap during a shower. Excessive washing is counterproductive.
  • Do not move the piercing: Do not forcibly twist or remove the piercing before it has healed.
  • Avoid pressure when sleeping: If you sleep on your side, lie on the opposite side.
  • Do not cover with hair: Tie long hair back or keep it away from your ears.
  • Do not let sweat or hair products get on it: Clean around the piercing after exercise or using hair products.
  • Avoid pools and hot springs: Avoid getting wet until completely healed.

To prevent recurring suppuration

Prevention Measure Details
Choose medical-grade piercings Use pure titanium, pure gold (18K or higher), or medical-grade stainless steel.
Keep piercings clean Disinfect the piercing itself regularly. Avoid long-term use of cheap piercings.
Get tested for metal allergies If the causative metal can be identified, you can choose appropriate materials.
Do not remove first piercings until healed 1-2 months for earlobes, 3-6 months or more for cartilage.
Maintain good health Maintain immunity through sleep, nutrition, and stress management.

Frequently Asked Questions

Q1. My pus has solidified. What is this?
A. This is solidified dried lymphatic fluid or pus. If it's just a scab of lymphatic fluid, it's part of normal healing, but if solidified pus repeatedly forms, smells bad, or is accompanied by swelling, it's a sign of suppuration. Do not forcibly squeeze or rub it; gently wash it away with soap.

Q2. Pus is coming out of my piercing hole. How can I treat it?
A. First, gently clean it with soap and lukewarm water, and do not remove the piercing on your own. Overuse of alcohol disinfectant is counterproductive. If it doesn't improve after 3 days of care, or if the pus increases or swelling spreads, consult a dermatologist.

Q3. Why shouldn't I remove my piercing if pus is coming out?
A. If you remove it yourself when it's suppurating, the exit of the piercing hole may close, and pus can accumulate inside the skin, making it worse. Whether or not to remove it depends on the severity of the symptoms, so please consult a doctor first.

Q4. My cartilage piercing is suppurating. Is the same care as an earlobe piercing okay?
A. Cartilage piercings have less blood flow than earlobe piercings, and infections can worsen more easily. Self-care similar to an earlobe may delay appropriate treatment. We strongly recommend seeing a dermatologist early to receive antibiotic treatment.

Q5. I don't know if I have a metal allergy. How can I tell?
A. If suppuration repeatedly occurs in the same area, worsens every time you change piercings, or if you experience severe itching, you may have a metal allergy. We recommend getting a patch test at a dermatologist.

Q6. Which department should I see?
A. Dermatology is appropriate. If you have "suppuration," "pain," or "cannot remove the piercing," please consult a dermatologist first.


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よくある質問

Frequently Asked Questions

Q 膿が固まっています。これは何ですか?
A

乾燥したリンパ液や膿が固まったものです。リンパ液のかさぶた程度であれば正常な治癒の一部ですが、固まった膿が繰り返しできる・悪臭がある・腫れを伴う場合は化膿のサインです。無理に絞り出したりこすったりせず、石けんで優しく洗い流してください。

Q ピアスの穴から膿が出ます。どうすれば治りますか?
A

まず石けんとぬるま湯で優しく洗浄し、ピアスを自己判断で外さないようにしてください。アルコール消毒液の使いすぎは逆効果です。3日ケアしても改善しない場合や、膿が増える・腫れが広がる場合は皮膚科を受診してください。

Q 膿が出ているのにピアスを外さないほうがいい理由は?
A

化膿していても自己判断で外すと、ホールの出口が塞がり、膿が皮膚の内部にたまって悪化することがあります。外すべきかどうかは症状の重症度によって判断が異なりますので、まず医療機関にご相談ください。

Q 軟骨ピアスが膿んでいます。耳たぶと同じケアで大丈夫ですか?
A

軟骨ピアスは耳たぶより血流が少なく、感染が悪化しやすい部位です。耳たぶと同じセルフケアでは対応が遅れることがあります。早めに皮膚科を受診し、抗生物質による治療を受けることを強くおすすめします。

Q 金属アレルギーかどうかわかりません。どう判断すればいいですか?
A

同じ部位で繰り返し化膿する・ピアスを変えるたびに悪化する・かゆみが強い場合は金属アレルギーの可能性があります。皮膚科でパッチテストによる検査を受けることをおすすめします。

Q 何科を受診すればいいですか?
A

皮膚科が適切です。「化膿している」「痛みがある」「ピアスが取れなくなった」という場合もまず皮膚科を受診してください。