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Published on: 8/20/2026

What could be the sudden cause of my palms and feet becoming sweaty?

Sudden sweaty palms and feet are most often caused by primary hyperhidrosis, a condition where sweat glands become overactive without an underlying medical cause. This response is frequently triggered by stress, anxiety, or strong emotions, but can also occur spontaneously. Secondary causes—such as thyroid issues, hormonal changes, infections, or certain medications—may also lead to sudden excessive sweating in the hands and feet.

Because sweaty palms and feet can point to several possible causes, identifying the right one is key to finding effective relief. Taking a free, instant, online symptom check can help you quickly narrow down potential causes based on your unique symptoms, giving you clearer insight into what's happening and guiding your next steps—whether that's self-care, lifestyle adjustments, or seeing a doctor.

Reviewed for medical accuracy: 07/15/2026

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When you suddenly notice your palms and feet becoming sweaty, the most common reason could be primary hyperhidrosis. This is a condition where the sweat glands in these areas become overactive, leading to sudden, noticeable sweating. It often happens without a fever or any serious illness. Your body can easily react to feelings like stress or nervousness by sending signals that wake up these sweat glands. Even small changes in your emotional state or environment, such as a warm day or a stressful moment, can trigger this response. In primary hyperhidrosis, it's not about an infection or fever but rather an issue with the way your body controls sweating. If this sudden sweating becomes uncomfortable or starts to affect your daily activities, you can use Ubie's free AI symptom checker to help identify potential causes and learn about next steps. A healthcare provider might suggest treatments like specialized antiperspirants or other effective therapies to help control excessive sweating.

(References)

  • Turchin I, Barankin B. Dermacase. Essential or primary hyperhidrosis. Can Fam Physician. 2005 Apr;51(4):503, 505-6. PMID: 15856967; PMCID: PMC1472949.

  • Wadhawa S, Agrawal S, Chaudhary M, Sharma S. Hyperhidrosis Prevalence: A Disease Underreported by Patients and Underdiagnosed by Physicians. Indian Dermatol Online J. 2019 Nov 1;10(6):676-681. doi: 10.4103/idoj.IDOJ_55_19. PMID: 31807447; PMCID: PMC6859754.

  • Romero FR, Haddad GR, Miot HA, Cataneo DC. Palmar hyperhidrosis: clinical, pathophysiological, diagnostic and therapeutic aspects. An Bras Dermatol. 2016 Nov-Dec;91(6):716-725. doi: 10.1590/abd1806-4841.20165358. PMID: 28099590; PMCID: PMC5193180.

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