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Oil, Vaseline and paraffin repair

Olive Oil, Vaseline or Paraffin Injected into the Penis: How Can It Be Repaired?

Injecting oil or paraffin for enlargement has been done for many years, but the body cannot break these substances down, and problems often develop later. The good news is that they can be treated with surgery by our specialist team.

Medically reviewed by Asst. Prof. Dr. Borisut Sanmano (Thai Medical Licence 23173) · Last updated October 2026

Oil / paraffin Fibrosis Skin
Illustration: oil spreads as tiny droplets through the tissue, and the body surrounds it with scar tissue until hard lumps form.

What happens when oil is injected

Olive oil, coconut oil, baby oil, Vaseline and paraffin are not substances the body can break down. The body tries to wall them off with inflammation and fibrous scar tissue, which turns into hard lumps known medically as a paraffinoma or sclerosing lipogranuloma. This can appear soon after injection or many years later.

Common symptoms

  • Hard, palpable nodules or irregular skin
  • Tight, discoloured or darkened skin
  • Swelling or a distorted shape
  • Pain during erection or intercourse
  • Foreskin that cannot be pulled back
  • In some cases, skin thins until it ulcerates or breaks open
Why it cannot be dissolved or sucked out

The enzyme hyaluronidase only dissolves HA filler. Oil and paraffin are embedded in tissue and scar tissue, so they cannot be suctioned or squeezed out, and attempting this may make the inflammation worse.

How it is treated

Ultrasound assessmentShows the extent of the substance and scar tissue. Some patients may also need an MRI for surgical planning.
Surgical planningThe specialist team assesses how much tissue needs to be removed and how the skin will be repaired.
Surgical removal of affected tissueAs much of the lumpy tissue and scar tissue as possible is removed.
Skin repairUsing nearby skin, such as scrotal skin, or a skin graft. Some patients need surgery in 2 stages.
Wound care and follow-upCheck-ups continue until the wound has fully healed, then any further refinement is considered.

Can I have filler after the repair?

In some cases, yes, once the wound has fully healed and the doctor considers the tissue ready. Injecting HA filler over an area where oil or paraffin still remains should be avoided.

The information on this page is for educational purposes. Treatment plans and results depend on an individual assessment by the doctor.

Frequently Asked Questions

I had oil injected many years ago. Can it still be repaired?

Yes, although scar tissue may increase over time. The doctor will assess the extent with ultrasound before planning.

Where is the surgery done? Do I need to stay in hospital?

It depends on the extent of surgery. Some cases can be done under local anaesthetic, while others need a hospital operating theatre. The doctor will advise after the assessment.

Will everything function normally after surgery?

The aim of surgery is to remove the problem substance and improve function. Results depend on the severity of each case.

Free consultation with the doctor. No obligation.Message us privately on WhatsApp or LINE. The doctor will recommend the approach that suits you best.
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