Primary vs. Secondary Hyperhidrosis: What’s the Difference?

If you're constantly sweating through shirts, even in cool weather or while sitting still, you're not alone — and you're not imagining things.
Excessive sweating can signal a condition called hyperhidrosis, which affects people of all ages and backgrounds and can significantly disrupt daily life. It's important to note, though, that not all hyperhidrosis is the same. Understanding the difference between primary and secondary hyperhidrosis is a crucial step toward choosing the right treatment path.
At Dermatology Research and Treatment Center in Dallas, TX, board-certified dermatologist Dr. Ross Radusky and dermatology PA Shevonne Chude provide patient-first, evidence-based care to help you manage sweat-related concerns with confidence.
What Is Primary Hyperhidrosis?
Primary hyperhidrosis is a medical issue characterized by excessive sweating without a discernible underlying cause. It often begins in childhood or adolescence and typically affects specific areas:
- Underarms (axillary hyperhidrosis)
- Palms
- Soles of the feet
- Face or head
This type of sweating usually occurs symmetrically on both sides of the body. It can be triggered by emotions or heat, but it may also happen unpredictably. Many people with primary hyperhidrosis have a family history of the condition.
What Is Secondary Hyperhidrosis?
In contrast, secondary hyperhidrosis stems from an underlying medical problem or medication. This type of sweating can impact the entire body and may occur during sleep, unlike primary hyperhidrosis.
Common causes include:
- Diabetes
- Thyroid disorders
- Infections
- Menopause
- Certain cancers
- Medications like antidepressants or pain relievers
If sweating starts suddenly in adulthood, is generalized, or is accompanied by other symptoms, it's essential to seek medical evaluation.
Why Does the Distinction Matter?
Knowing which type of hyperhidrosis you have helps determine the most effective solution:
Primary hyperhidrosis is often managed with topical products, BOTOX® injections, oral medications, or minimally invasive procedures.
Secondary hyperhidrosis requires treating the root cause, such as adjusting medications or managing an underlying health issue.
Seek Compassionate, Personalized Care in Dallas
At Dermatology Research and Treatment Center, Dr. Radusky and Shevonne Chude bring years of clinical expertise and a compassionate, patient-centered approach to treating hyperhidrosis. Whether you're struggling with sweaty palms that interfere with your work or night sweats that interrupt your sleep, their team can help uncover the cause and guide you toward relief.
Contact Dermatology Research and Treatment Center in Dallas, TX, to explore your options for hyperhidrosis. Call 972-661-2729 to schedule a personalized consultation today.