Up to 40% of people who develop HS have a family member with the condition, which suggests that the condition may be linked to certain genes.

Unfortunately, it’s not yet clear exactly how genes are involved in the development of HS. Though having relatives with HS may increase your chances of developing it, there’s no direct link that guarantees you will also have it.

Smoking can increase your risk of developing HS. In fact, up to 90% of people with HS are either smokers or former smokers.

If you smoke, your doctor has probably told you that quitting can improve your symptoms and your overall quality of life. If you want to quit but are finding it difficult, your healthcare team can support you to find a method that works for you.

Being overweight can increase the risk of developing HS or lead to more severe symptoms. If you struggle with your weight and worry that it may be a factor in your HS, talk to your doctor about how to get to a weight that’s healthy for you. Even a small change can make a difference.

Women are three times more likely to develop HS than men and may experience a worsening of symptoms around hormonal changes such as pre-menstruation, menstruation, pregnancy and after pregnancy. Unfortunately, researchers don't yet understand why.

Several American studies have indicated that African Americans may be more likely to develop HS than white Americans, while another European study has shown that the prevalence of HS among black people is the same as among white people.

HS usually develops after puberty, but it can occur at any age after puberty.

People with autoimmune conditions, such as psoriasis and disorders of the endocrine system (hormonal system), such as polycystic ovary syndrome (PCOS), are more likely to develop HS.