Excessive SweatingWhat it is, and what we can do about it.

What hyperhidrosis is

Sweating is a thermoregulatory function. Nerves of the sympathetic nervous system signal eccrine sweat glands to release sweat, which evaporates and cools you. In hyperhidrosis, that signalling is overactive: the glands themselves are normal, but they are being told to work far harder than the situation requires.

The result is sweating that has nothing to do with how warm you are or how hard you are working. People with hyperhidrosis sweat in air-conditioned rooms, in winter, sitting still.

Primary and secondary

Primary focal hyperhidrosis is the more common form. It affects specific areas, most often the underarms, palms, soles, scalp and face, it is generally symmetrical, it usually begins in adolescence or early adulthood, and it frequently runs in families. There is no underlying disease causing it. This is the form that responds well to targeted treatment.

Secondary generalised hyperhidrosis is sweating caused by something else: a medical condition, a hormonal change such as menopause, or a medication. It tends to be more widespread rather than focal, and it can occur during sleep, which primary hyperhidrosis usually does not.

That distinction matters clinically. If your sweating began suddenly in adulthood, is one-sided, occurs mainly at night, or comes with other symptoms such as weight loss or fever, the right first step is medical assessment to find the cause rather than treatment aimed at the symptom. We will tell you if we think that applies to you.

The part that does not show up in a symptom list

Hyperhidrosis is routinely underestimated because sweating sounds trivial. It is not.

People plan their wardrobe around it, avoiding certain colours and fabrics entirely. They dread handshakes and shy away from holding hands. They struggle with paperwork, touchscreens and musical instruments because their hands are wet. They change clothes at work. They decline social invitations. They are frequently told, unhelpfully, to relax, as though anxiety were the cause rather than a consequence.

If any of that is familiar, you are describing a genuine medical condition with a genuine treatment, not a personal failing.

How botulinum toxin treatment works

Nerves signal sweat glands using acetylcholine. Botulinum toxin blocks the release of acetylcholine at the nerve ending. Injected into the skin across an affected area, it interrupts that local signal, and the sweat glands in that area produce dramatically less sweat.

The glands are not destroyed. Nerve signalling gradually recovers, which is why the effect is temporary and why treatment is repeated periodically. It also means the treatment is entirely reversible, which some people find reassuring.

At Bradford Skin Clinic & Medical Spa we offer Botox, Dysport and Xeomin, and treatment is performed by regulated nurses within a nurse-practitioner-led practice. Our Medical Director, Alex Dinovich, FNP-PHC, is an authorised prescriber.

Areas we treat

Underarms are the most commonly treated site and generally the most straightforward, involving a grid of small superficial injections across the affected area.

Palms and soles can be treated, though they are more sensitive to inject and there is a specific discussion to have about temporary reduction in grip strength.

Scalp and face can be treated where sweating in those areas is the main problem.

Mapping the area accurately matters. A starch-iodine test can be used to identify exactly where the active sweating is occurring, so treatment is placed where it is needed rather than spread evenly across an assumed area.

Insurance in Ontario

This is worth knowing, because many people do not. Botulinum toxin for hyperhidrosis is a medical rather than a cosmetic indication, and some private extended health plans in Ontario provide coverage for it.

Coverage varies considerably between plans, and we cannot tell you what yours covers. What we can do is suggest you contact your insurer and ask specifically about botulinum toxin for hyperhidrosis, and provide appropriate documentation to support a claim. It is a five-minute phone call that occasionally changes the whole picture.