Pilonidal Sinus vs Hidradenitis Suppurativa: Understanding the Differences

Pilonidal Sinus Disease

Pilonidal sinus is a chronic skin condition where a cyst or abscess forms in the sacrococcygeal area (near the tailbone). It occurs when hair follicles become embedded in the skin, causing inflammation, infection, and drainage. The condition typically develops from a combination of genetic predisposition, hair growth patterns, and friction.

Hidradenitis Suppurativa (HS)

Hidradenitis suppurativa is a chronic inflammatory skin condition affecting the apocrine sweat glands, typically in the armpits, groin, and under the breasts. It's characterized by recurrent painful nodules, abscesses, and sinus tracts. HS is an autoimmune condition with genetic predisposition and is considered a systemic disease.

Pilonidal Sinus Symptoms

• Pain in sacrococcygeal area
• Drainage (pus or blood)
• Swelling and redness
• Visible pit or opening
• Discomfort while sitting

Hidradenitis Suppurativa Symptoms

• Painful nodules (bumps)
• Recurrent abscesses
• Drainage and scarring
• Multiple lesions
• Severe pain and discomfort

Pilonidal Sinus Causes

• Primary Cause: Hair follicles embedded in skin
• Genetic Predisposition: Family history increases risk
• Hair Growth: Thick, coarse body hair
• Friction: Prolonged sitting, tight clothing
• Poor Hygiene: Inadequate hair removal
• Gender: More common in males (4:1 ratio)

Hidradenitis Suppurativa Causes

• Primary Cause: Inflammation of sweat glands
• Autoimmune: Immune system dysfunction
• Genetic: Strong family history component
• Hormonal: Worsens with hormonal changes
• Smoking: Major risk factor
• Gender: More common in females (3:1 ratio)

Pilonidal Sinus Diagnosis

• Clinical examination
• Visible pit at midline
• Ultrasound or MRI
• Single site involvement

Hidradenitis Suppurativa Diagnosis

• Clinical examination
• Multiple lesions in characteristic areas
• Ultrasound or MRI
• Multiple site involvement

Pilonidal Sinus Treatment

Hidradenitis Suppurativa Treatment