Skin Tags: Symptoms, Types, Causes and Treatment

Skin tags, medically known as acrochordons, are among the most common benign skin growths, especially in adults. While often harmless, their appearance and possible associations with underlying health conditions prompt many people to seek more information—or removal. In this comprehensive article, we explore what skin tags are, how they manifest, the types you might encounter, the factors that contribute to their development, and the latest evidence-based approaches to treatment.

Symptoms of Skin Tags

Skin tags can appear suddenly and may go unnoticed at first. Recognizing their typical signs helps differentiate them from other skin conditions and guides decisions about seeking care.

Appearance	Location	Sensation	Source(s)
Small, soft, pedunculated or sessile growths, skin-colored to dark brown	Neck, axillae, groin, eyelids, submammary, less commonly genitalia and nipple	Usually painless; may cause discomfort or irritation if large or in friction-prone areas	1, 3, 6

Table 1: Key Symptoms

Common Signs and Characteristics

Most skin tags are:

• Small and Soft: Typically ranging from 2 to 5 mm, but sometimes much larger in rare cases (so-called “giant” skin tags) 3.
• Color: Skin-colored, though some may appear darker brown or hyperpigmented 3 8.
• Shape: Usually pedunculated (attached by a stalk), but some are sessile (broad-based) 1 3.
• Surface: Smooth or slightly wrinkled.

Typical Locations

Skin tags are most commonly found in areas where skin rubs against skin or clothing, such as:

• Neck and Axillae (armpits): Most frequent sites 3 6.
• Groin and Submammary Folds: Common, especially in overweight individuals 3 2.
• Other Sites: Less commonly on the eyelids, penis, labium majus, or nipples 1 3 6.

Sensation and Associated Symptoms

• Asymptomatic: Most skin tags do not cause pain or symptoms.
• Discomfort: Larger tags or those in areas prone to friction may cause slight irritation or discomfort 1 3.
• Rare Symptoms: Occasionally, skin tags can become intermittently painful or discolored, especially if twisted or traumatized 1.
• Cosmetic Concerns: The most common reason people seek removal is for aesthetic reasons or if the tag catches on jewelry/clothing 3.

Types of Skin Tags

While all skin tags are benign, there are distinct subtypes and unusual presentations that are important to recognize.

Type	Key Features	Usual Location	Source(s)
Acrochordon	Small, soft, skin-colored, short stalk	Neck, axillae, groin	1, 3
Fibroepithelial Polyp (FEP)	Larger, long/narrow stalk, may contain ducts	Nipple (rare), other folds	1
Giant Skin Tag	Unusually large (>1 cm), can cause discomfort	Vulva, rare sites	3
Polypoid Eccrine Nevus	Congenital, rare, may mimic skin tag	Sacrococcygeal region	6

Table 2: Types of Skin Tags

Acrochordon: The Classic Skin Tag

• Most Common: Small, soft, and usually attached by a short stalk 1 3.
• Color: Skin-colored to brown.
• Sites: Predominantly in areas of friction—neck, axillae, groin 3.

Fibroepithelial Polyp (FEP)

• Rare Variant: Larger than typical acrochordons, with a long, narrow stalk. Can contain additional benign structures, such as lactiferous ducts when found on the nipple 1.
• Symptoms: FEPs can become symptomatic over time due to their size and location, sometimes causing pain or discoloration 1.

Giant Skin Tags

• Unusual and Large: Can grow to several centimeters, causing discomfort or cosmetic concern 3.
• Reported Sites: Vulva, penis, and labium majus are rare but documented locations for giant skin tags 3.
• Significance: May require surgical removal for relief and diagnosis 3.

Other Rare Forms

• Polypoid Eccrine Nevus: Sometimes mistaken for a skin tag in the sacrococcygeal region, particularly in children 6.
• Differential Diagnoses: Skin tags must be distinguished from nevi, neurofibromas, and rare benign or malignant tumors (e.g., aggressive angiomyxoma) 3.

Causes of Skin Tags

The exact reason why skin tags develop remains a topic of ongoing research. However, multiple contributing factors have been identified.

Factor	Association	Evidence	Source(s)
Friction	Common in skin folds and friction sites	Strong	3 4
Obesity	Higher incidence in overweight individuals	Strong	2 3 4
Metabolic Syndrome	Association with diabetes, hyperlipidemia	Moderate	2 4
Hormonal Changes	Pregnancy, endocrine disorders	Moderate	3
Genetic Predisposition	Familial tendency observed	Suspected	3
HPV Infection	Detected in nearly half of samples studied	Moderate	5
Hyperhidrosis	Increases risk by almost 3-fold	Strong	4
Age	More common in adults, rare in children	Strong	3 6

Table 3: Causes and Risk Factors

Friction and Skin Folds

• Repeated Friction: The most widely accepted theory is that skin tags develop in areas exposed to repeated friction, such as skin folds (neck, axillae, groin, under breasts) 3 4.
• Hyperhidrosis (Excessive Sweating): Increases local moisture and friction, and is independently associated with a significantly higher prevalence of skin tags 4.

Metabolic and Endocrine Factors

• Obesity: Strongly associated with multiple skin tags 2 3 4.
• Metabolic Syndrome: Links to diabetes, insulin resistance, hyperlipidemia, and acanthosis nigricans have been documented 2 4.
• Thyroid Disorders: Some studies suggest a possible association with hypothyroidism, but this remains inconclusive 2.

Hormonal and Genetic Influences

• Pregnancy: Hormonal changes may trigger new skin tags or growth of existing ones 3.
• Genetics: A familial tendency is suspected, though not fully established 3.

Infectious and Immunological Factors

• HPV Infection: Human papillomavirus (HPV) types 6 and 11 have been detected in up to 47% of skin tags studied, pointing to a possible viral etiology 5.
• Immune Response: Mast cells and eosinophils may play a role in the fibrotic process of skin tag formation 3.

Age and Unusual Presentations

• Age: Skin tags are common in middle-aged and older adults but rare in children. When seen in pediatric populations, especially in unusual sites, further evaluation may be warranted to rule out congenital or neoplastic conditions 1 6.

Treatment of Skin Tags

Most skin tags are harmless and do not require treatment unless bothersome. However, cosmetic or symptomatic concerns, or uncertainty about the diagnosis, often lead individuals to seek removal.

Treatment Modality	Method/Description	Main Advantages	Source(s)
Simple Excision	Snip excision with scissors/scalpel	Immediate removal, histology possible	1 8 10
Cryotherapy	Freezing with liquid nitrogen/device	Minimally invasive, fast, good cosmetic outcome	9 11
Chemical Cautery	Ferric subsulfate, silver nitrate, aluminum chloride	Hemostasis, variable pain/pigmentation	10
Ligation Devices	Pressure-based adhesive patches	Painless, home use, effective for small tags	7
Laser Ablation	Targeted removal with laser	Precise, minimal scarring	3
Topical Anesthesia	Ethyl chloride spray	Painless excision	8

Table 4: Treatment Options

Office-Based and Surgical Approaches

• Snip Excision: The most common method, performed with sterile scissors or a scalpel. Local anesthesia can be used, but ethyl chloride spray offers a painless alternative 8 10.

  • Advantages: Immediate results, tissue can be sent for pathology (important for atypical or large lesions) 1 8.
  • Aftercare: Hemostasis is typically achieved via chemical cautery; ferric subsulfate and aluminum chloride cause less pain than silver nitrate, with similar efficacy 10.

• Simple Surgical Excision: Used for larger or symptomatic tags, especially rare variants like fibroepithelial polyps 1 3.

Cryotherapy and Laser Ablation

• Cryotherapy: Application of liquid nitrogen or cryogenic devices (like Pixie® Skin Tag pen) freezes the tag, causing it to fall off in days 9 11.

  • Benefits: Minimally invasive, excellent cosmetic outcome, well tolerated 9.
  • Limitations: May require multiple sessions for larger tags 9.

• Laser Ablation: Effective, especially for tags in cosmetically sensitive areas 3.

At-Home and Novel Treatments

• Ligation Devices: New adhesive patches apply pressure to cut off blood supply, causing the tag to fall off in 3-6 days. Most effective for small tags (up to 1-2 mm) 7.

  • Advantages: Painless, excellent cosmetic results, minimal discomfort 7.

• Ethyl Chloride Spray: Used as a topical anesthetic to make excision nearly painless 8.

Other Considerations

• Tissue Forceps: A simple, fast method with good cosmetic results, especially when performed by a trained provider 11.
• Complications: Risks are low but can include minor bleeding, pigment changes, or rarely, infection 10.
• When to See a Doctor: If the lesion is unusually large, changing, or located in an uncommon area (e.g., nipple, genitals, sacrococcygeal region), professional evaluation is important to rule out other conditions 1 3 6.

Conclusion

Skin tags are common, benign skin growths with a variety of presentations and causes. They are usually harmless, but their removal is sought for cosmetic or symptomatic reasons. Understanding their types, causes, and evidence-based treatment options helps individuals make informed decisions about care.

Key Takeaways:

• Skin tags are soft, benign lesions most commonly found in skin folds and friction-prone areas.
• Classic acrochordons are the most frequent type, but rare variants such as fibroepithelial polyps and giant tags exist.
• Risk factors include friction, obesity, metabolic syndrome, hormonal changes, and possibly HPV infection.
• Treatments range from simple snip excision and cryotherapy to novel at-home devices, with most methods being safe and effective.
• Always seek professional advice for atypical, symptomatic, or rapidly growing lesions to rule out other conditions.

By being informed about skin tags, individuals can confidently decide when to monitor, treat, or seek medical advice for these common skin growths.