Is Hidradenitis Suppurativa hereditary?

Hidradenitis suppurativa is considered a multifactorial condition, meaning it is influenced by a combination of genetic predisposition and environmental factors rather than a single gene mutation. While it often runs in families and can be hereditary, it does not follow a simple Mendelian inheritance pattern, making the exact risk for children difficult to quantify precisely.

Is Hidradenitis Suppurativa hereditary or genetic?

Hidradenitis suppurativa is both genetic and hereditary in the sense that a predisposition to the condition can be passed down through families. Research indicates that approximately 30% to 40% of individuals with hidradenitis suppurativa report a positive family history of the disease. However, it is not caused by a single "broken" gene. Instead, it is a complex, multifactorial trait where multiple genetic variants interact with environmental triggers—such as smoking, hormonal fluctuations, and obesity—to manifest the disease. Because it is multifactorial, it is not strictly inherited in a predictable autosomal dominant or recessive pattern.

What is the risk of passing Hidradenitis Suppurativa to children?

Because hidradenitis suppurativa does not follow a classic inheritance pattern, there is no fixed percentage of risk for the children of an affected parent. The condition is likely polygenic, involving many genes that regulate immune system function and the integrity of the hair follicle. If one parent has hidradenitis suppurativa, the risk to their children is higher than that of the general population, but it is not guaranteed that the child will develop the disease. The expression of the disease is highly variable, meaning even family members who inherit the genetic susceptibility may experience symptoms with different levels of severity.

Is genetic testing available for Hidradenitis Suppurativa?

Currently, there is no standard clinical genetic test for hidradenitis suppurativa. Because the condition is multifactorial and not caused by a single gene mutation, genetic testing cannot reliably predict who will develop the disease. Genetic testing is typically reserved for rare, syndromic forms of the condition that may be associated with specific genetic disorders, but for the vast majority of patients, diagnosis is based on clinical presentation rather than genetic analysis.

What is the role of genetic counseling for families?

Genetic counseling is highly valuable for families navigating the complexities of hidradenitis suppurativa. A genetic counselor can help families:

• Review family history to identify patterns of inheritance.


• Provide education on the multifactorial nature of the disease to reduce self-blame.


• Discuss the impact of lifestyle factors (like smoking cessation) that may modify the expression of the genetic risk.


• Offer support in managing expectations regarding the variable nature of symptom onset and severity among family members.

Are de novo mutations common in this condition?

De novo (spontaneous) mutations are not considered a primary driver of typical hidradenitis suppurativa. Because the condition is multifactorial, it is much more common to see the disease emerge due to the inheritance of a combination of susceptibility genes and exposure to environmental triggers, rather than a new, spontaneous genetic error in a single individual.

Next steps

• Consult a board-certified dermatologist who specializes in inflammatory skin conditions to discuss your specific family history and symptom management.


• Connect with the 729 members of the DiseaseMaps.org community who are living with hidradenitis suppurativa to share experiences and coping strategies.


• Speak with a genetic counselor if you have concerns about the recurrence risk in your family or if you are planning to start a family.


• Keep a detailed log of your symptom triggers to help your medical team tailor your treatment plan.

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Hidradenitis Suppurativa Overview.


• Orphanet: Rare Disease Database (ORPHA: 395).


• OMIM (Online Mendelian Inheritance in Man): Entry #142690 (Hidradenitis Suppurativa).


• The Hidradenitis Suppurativa Foundation: Patient resources and clinical research updates.