Crystallized Phenol Treatment in Pilonidal Sinus (Ingrown Hair) Disease

Pilonidal sinus disease is a chronic inflammatory disease that develops in the sacrococcygeal (tailbone) region, particularly common in young adult men. It is commonly known as "ingrown hair." The disease is characterized by hairs penetrating under the skin, chronic infection, and the formation of sinus tracts.

In addition to surgical treatment methods, minimally invasive approaches have come to the forefront in recent years. One of these methods is crystallized phenol treatment for pilonidal sinus disease.

What is a pilonidal sinus?

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Pilonidal sinus;

• In the tailbone area

• On or near the midline

• Having one or more sinus openings

• Containing hair and detritus

• It is a disease characterized by chronic inflammation.

  
  

Pathogenesis

The underlying mechanism in the development of the disease is explained by the established theory :

1. Accumulation of hairs in the intergluteal groove

2. Penetration into the skin through friction and vacuum effect.

3. Foreign body reaction

4. Formation of sinus tracts

5. Recurrent infection and abscess formation

What is crystallized phenol?

Phenol (carbolic acid) is an agent that causes protein denaturation and chemical destruction. By applying crystallized phenol:

• Chemical ablation of sinus epithelium

• Destruction of granulation tissue

• Closure of the sinus cavity due to fibrosis.

is intended.

It is a minimally invasive method that can be performed under local anesthesia.

How is crystallized phenol treatment applied in pilonidal sinus (ingrown hair) disease ?

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Steps

1. Local anesthesia is administered.

2. The sinus openings are widened.

3. The hairs and debris inside are curetted out.

4. The sinus cavity is cleaned with saline solution.

5. Crystallized phenol is placed inside the sinus.

6. Entrances are either closed or left open.

   
   

Processing Time

• Average 10–20 minutes

• It can be applied in an outpatient clinic setting.

• Hospitalization is not required.

  
  

Which patients is it suitable for?

Crystallized phenol treatment in particular:

• Without acute abscess

• Having a limited number of sinus openings

• Lacking a complex tract structure

• First-time diagnosis

• In patients with minimal recurrence

It can be implemented with a high success rate.

Inappropriate situations

• Wide lateral extension

• Numerous secondary tracts

• Active abscess

• Severely fibrotic tissues

In these cases, surgical methods may be more appropriate.

Success Rate and Recurrence Risk

Success rate of crystallized phenol treatment in the literature:

• It is reported to be between 70% and 90%.

• Multiple sessions may be required.

• The recurrence rate may be similar to or slightly higher than with surgery.

Factors that influence success:

• Patient selection

• Number of tractors

• Hygiene

• Regional hair growth

• Body mass index

  
  

Advantages

• General anesthesia is not required.

• No hospitalization required.

• Workforce loss is minimal.

• No stitches

• The cosmetic result is good.

• The pain is less compared to surgery.

  
  

Disadvantages

• Need for repeated sessions

• Inadequacy in major and complex diseases.

• Rarely causes skin irritation.

  
  

Post-Transaction Period

Things the patient should pay attention to.

• Area hygiene must be ensured.

• Hair should be removed regularly (laser hair removal may be recommended).

• Prolonged sitting should be avoided.

• Sweating should be reduced.

The recovery process usually takes 2–4 weeks.

Comparison of Crystallized Phenol and Surgical Methods

Feature	Crystallized Phenol	Surgical Excision
Anesthesia	Local	Spinal / General
Hospitalization	None	Yes (mostly)
Return to Work	1-2 days	2-4 weeks
Wound	Minimal	Large surgical field
Recurrence	Middle	Low (in a carefully selected case)

Current Clinical Approach

Minimally invasive methods are recommended as first-line treatment in the appropriate patient group. Crystallized phenol is particularly suitable for young, active working individuals.

• Comfortable

• Economic

• Fast

• It is an effective alternative.

Conclusion

Crystallized phenol therapy, when appropriately selected, is an effective, minimally invasive, and highly comfortable treatment method for pilonidal sinus disease. However, it is not suitable for every patient. The correct method should be chosen based on the extent of the disease, the structure of the tract, and the patient's expectations.