Excessively sweaty feet can be a daily nuisance. On this page you can calmly read what the condition involves and which steps are possible.
The condition
De klacht
Sweaty feet, medically called plantar hyperhidrosis, means that the sweat glands in the soles of the feet produce more perspiration than is needed to regulate body temperature. You recognize it by feet that often feel damp or wet, socks and shoes that quickly become soaked, and sometimes an unpleasant odor that develops when skin bacteria break down the sweat. The condition can be present all year round, even without heat or exertion. Many people mainly experience the social discomfort: slipping in sandals, wet footprints, or avoiding taking off their shoes in front of others.
Mogelijke aanpak
When simpler measures are not enough, botulinum toxin can be considered as an option. It is administered through small intradermal injections into the sole of the foot and temporarily blocks the nerve signals to the sweat glands, reducing sweat production. The effect lasts on average about four to six months and can be repeated. Whether this is useful and suitable for you is assessed during a consultation.
The sole of the foot is a sensitive area, so we honestly discuss beforehand how the treatment works and which measures can increase comfort during the injections. It is a symptom-relieving approach, not a permanent solution.
In most people with sweaty feet, it is primary hyperhidrosis. This means there is no underlying disease, but the sweat glands are naturally overactive, probably due to increased stimulation from the autonomic nervous system. This form often starts in childhood or during puberty, frequently runs in families, and is usually limited to specific areas such as the soles of the feet, the palms of the hands, or the armpits.
There is also secondary hyperhidrosis, where excessive sweating is a result of something else. Think of hormonal changes, thyroid problems, certain medications, or other conditions. It is often characteristic that sweating occurs more widely over the body, that it only starts at a later age, or that it is also present at night. This distinction is important, because the right approach starts with understanding the cause.
An appointment can be useful when the complaint bothers you daily, when simple measures such as antiperspirants or adapted socks and shoes do not give enough result, or when you are unsure whether something underlying is going on. Also if the moist skin leads to recurring problems such as cracks, fungal infections between the toes, or skin irritation, it is wise to have this checked.
During a consultation, it is first determined whether it is primary or secondary hyperhidrosis and whether further examination or referral is needed. Only after that is it discussed which treatment options fit your situation. This way you avoid treating a symptom while an underlying cause remains untreated.
The approach to sweaty feet usually proceeds step by step, from simple to more intensive. Which step is useful depends on the severity of the complaint and on what you have already tried before.
Botulinum toxin temporarily blocks the signal from the nerve to the sweat gland. Without that signal, the glands in the treated area produce less sweat. For sweaty feet, the product is injected into the sole of the foot through several small intradermal injections. The effect usually appears within a few days to about two weeks and lasts on average four to six months. After that, sweat production gradually returns and the treatment can be repeated. The duration and degree of improvement can vary from person to person.
A point of attention is that the sole of the foot is a sensitive area, so the injections can be experienced as more painful than in other places. Therefore, it is discussed beforehand which measures can increase comfort. Botulinum toxin is and remains a symptom-relieving treatment: it addresses the complaint, not the predisposition. It is therefore not a first choice, but an option when other steps fall short.
The treatment can be useful for people with troublesome primary plantar hyperhidrosis who respond insufficiently to antiperspirants or iontophoresis. It is not indicated during pregnancy or breastfeeding, in certain neuromuscular disorders, in case of known hypersensitivity to the substance used, or in case of an active infection or skin problem at the injection site. When a secondary cause is suspected, the examination and treatment of that cause come first. Whether botulinum toxin is a sensible choice for you is always assessed individually.
As with any medical procedure, temporary reactions are possible. At the injection sites, slight redness, small bruises, or tenderness can occur. These usually disappear on their own. Because it concerns injections into the sole of the foot, there can be brief pressure sensitivity when walking. With treatment of the feet or hands, temporary, usually mild muscle weakness in the surrounding small muscles has been described. Serious side effects are rare. All relevant risks are discussed with you beforehand, so that you can make an informed choice.
During the consultation, your complaint is mapped out: how long has it existed, which areas are affected, what have you already tried, and what impact does it have on your daily life. It is determined whether it is primary or secondary hyperhidrosis. Based on that, it is discussed which options are suitable and what you can realistically expect from them, including their limitations. No results are promised.
When botulinum toxin is chosen, the treatment usually takes place in a separate appointment. The feet are cleaned and the injection sites are carefully distributed over the soles. Afterwards, you can usually go home immediately. Some aftercare advice, such as avoiding intensive strain on the feet shortly after the treatment, is given. The cost is discussed neutrally during the consultation.
Even when you choose a medical treatment, the simpler measures remain valuable. Antiperspirants, adapted socks and shoes, good foot hygiene, and, where useful, iontophoresis can support the result and make the periods between treatments more pleasant. Often a combination is suitable, tailored to your feet and your daily situation. A personal assessment is a wise first step.
Dr. T explains
Sweating is a normal and useful mechanism, but with hyperhidrosis the sweat glands are essentially on high alert too often. Botulinum toxin temporarily interrupts the nerve signal that drives the glands, so they produce less sweat in the treated area. It does not fix the underlying tendency and only works locally, so sweat production returns over time. That is why I see it as a tool within a broader approach, not a one-time solution.
Dr. Thierry De Smedtaesthetic physician, Ghent
Wat je mag verwachten
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Frequently asked questions
Every situation is different. During a consultation in Ghent you receive a personal medical assessment and honest advice about what is and is not useful.
