Tu tried various methods, including deodorants, topical medications, and rubbing lemon, a folk remedy, but her condition did not improve. Instead, her underarm skin became dark and easily irritated. Dr. Vu Thi Thuy Trang, a dermatologist and cosmetic dermatologist at Tam Anh General Hospital, Ho Chi Minh City, diagnosed Tu with hyperhidrosis of the underarms—a condition where sweat glands are overactive, producing more sweat than needed for thermoregulation.

Primary focal hyperhidrosis is often linked to overactivity of the sympathetic nervous system. It can begin in childhood, puberty, or adolescence.

According to Dr. Trang, puberty is a phase of significant hormonal changes, leading to increased sweat gland activity. In some individuals, this overactivity occurs in specific areas like the underarms, palms, or soles, causing persistent dampness and increasing the risk of body odor. While sweat itself is odorless, its combination with skin bacteria can produce an unpleasant smell, significantly impacting daily life, psychological well-being, and self-confidence, especially among students. Many young people experience persistent hyperhidrosis and body odor despite meticulous hygiene.

A doctor injects botox to treat underarm hyperhidrosis for Tu. Photo: Tam Anh General Hospital.

As Tu is an adolescent and preferred a minimally invasive treatment, the doctor prescribed botulinum toxin injections. This substance, also known as botox, temporarily inhibits nerve signals to the sweat glands, thereby reducing local sweat production.

During the treatment, Tu experienced only a slight stinging sensation and could resume normal activities after the injection. After about two weeks, the amount of underarm sweat significantly decreased, the underarm skin felt drier, and body odor noticeably improved. The effectiveness of botox typically lasts for four to six months, depending on individual physiology and the severity of hyperhidrosis.

Dr. Trang stated that not all cases of excessive sweating require botox treatment. Patients need to be examined to assess the cause, differentiating primary hyperhidrosis from secondary causes such as: endocrine disorders, infections, medication side effects, neurological conditions, or other systemic diseases. Some cases can be improved by lifestyle changes, wearing breathable clothing, using appropriate antiperspirants, topical medications, or other supportive measures.

Individuals prone to hyperhidrosis should practice gentle hygiene, keep their underarms dry, limit excessive shaving or plucking, and avoid using irritating active ingredients on the skin. They should not self-apply lemon, baking soda, or other folk remedies with strong acidic or alkaline properties, as these can damage the skin's protective barrier, making the underarms darker and more sensitive.

If excessive sweating is severe, persistent, or impacts psychological well-being and daily life, patients should seek early medical consultation for appropriate advice and treatment.

Minh Huong

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