What causes persistent foot sweating when barefoot?

Excessive foot sweating—especially when barefoot—is commonly caused by conditions such as hyperhidrosis, tinea pedis (athlete’s foot), and hyperthyroidism. So, what exactly causes persistent foot sweating when barefoot? Below, we address this question.

What Causes Persistent Foot Sweating When Barefoot?

1. Hyperhidrosis

Hyperhidrosis refers to abnormally increased sweating—either localized or generalized—often resulting from endocrine imbalance or hormonal dysregulation. When barefoot, excessive foot sweating may persist. Treatment options include topical application of aluminum acetate or aluminum chloride solutions to the feet, along with oral administration of compound phenobarbital sodium bromide tablets.

2. Tinea Pedis (Athlete’s Foot)

Tinea pedis is a superficial fungal infection caused by dermatophytes invading the skin between the toes and/or toenails. Poor local hygiene may also contribute. Symptoms include scaling, whitish softening and maceration of the skin, erosion, pruritus, and excessive foot sweating. Topical wet compresses using furazolidone solution or berberine solution are recommended. For more severe cases, oral antibiotics such as roxithromycin capsules or cefalexin capsules may be prescribed.

3. Hyperthyroidism

Hyperthyroidism results from abnormal overproduction of thyroid hormones, leading to symptoms including excessive foot sweating, unintentional weight loss, and palpitations. Standard treatment includes antithyroid medications such as methimazole tablets or propylthiouracil tablets. Additionally, patients are advised to soak their feet in warm water each evening during treatment—this promotes local blood circulation and supports recovery.

We hope the above information is helpful to you.