Very mild pain in most cases
Botulinum toxin injections for hyperhidrosis are well tolerated by most patients and do not cause significant pain. These are superficial intradermal injections performed using very fine needles, similar to those used for skin allergy tests or mesotherapy.
Injection at each point is quick, taking only a few seconds, and the discomfort is comparable to a mosquito bite or tiny scratch. There may be a slight temporary burning or tingling sensation, but pain generally does not last more than a few minutes. This high tolerability is partly due to the shallow injection depth, which reaches neither muscles nor nerves.
Pain depends on the treated area
Not all body areas have the same sensitivity during injection. Pain perception varies largely according to the density of nerve endings in the skin, making injections in some regions more tolerable than others.
The underarms (the only authorised indication) are by far the most frequently treated area and also the best tolerated by patients. The skin is supple, has relatively few nerves and injections cause very mild discomfort. In most cases, no local anaesthesia is needed. Many patients describe the procedure as merely uncomfortable, sometimes even completely painless.
To improve comfort, local anaesthesia with a lidocaine-based cream is often offered. In particularly sensitive patients, regional anaesthesia — such as a nerve block — may be performed in the medical practice, ensuring a virtually painless session without affecting treatment effectiveness.
Effective strategies to limit discomfort
Pain management depends not only on the treated area : preparation, the doctor's technique and patient support also matter. An experienced doctor will use very fine single-use needles to minimise pain, adjust injection speed and depth to avoid pain from excessive pressure, use distraction or breathing techniques if the patient is anxious, and anticipate sensitivity with local anaesthesia when indicated.
Patients are also reassured during consultation : prolonged or disabling pain is not expected after the procedure. Professional and social activities can be resumed immediately.
Pain after injection : what should you expect ?
In the hours following a session, mild local side effects are common, although these are not strictly pain : increased sensitivity to touch, a feeling of tightness or warmth, or slight swelling, more common in sensitive areas such as the palms or feet. These effects are temporary and resolve spontaneously within 24 to 48 hours. They require no specific treatment. Painkillers are generally unnecessary, apart from paracetamol if needed.
Patient comfort during injection
In aesthetic medicine as in functional medicine, the quality of the patient experience is central to care. This involves clear, precise information, a well-prepared session in a reassuring environment and an attentive doctor who adjusts the procedure to individual sensitivity. Patients who fear needles or pain often benefit from appropriate psychological support combining guided breathing, verbal reassurance and a gradual approach. In practice, patient feedback is very positive. The functional benefit achieved, particularly the marked reduction in sweating, far outweighs the temporary discomfort during injection. This lasting effectiveness, combined with a significant improvement in quality of life, leads the vast majority of patients to continue treatment and repeat sessions without hesitation.
Is pain different in men and women ?
It is reasonable to ask whether tolerance of botulinum toxin injections varies by sex, particularly for functional treatments such as hyperhidrosis care. Although perceived pain is primarily subjective and multifactorial, physiological and behavioural differences between men and women may influence the treatment experience.
Biologically, women's skin is generally thinner and more vascularised, which may make it more sensitive to superficial injections. In addition, certain phases of the menstrual cycle – particularly the luteal (premenstrual) phase – are associated with increased pain sensitivity due to changes in hormone levels, particularly progesterone.
However, in clinical practice, women are often observed to show greater emotional tolerance of discomfort than men, particularly because they are more accustomed to aesthetic treatments (hair removal, dermatological care, aesthetic injections). Men may experience the medical procedure with particular intensity.
The difference between men and women remains moderate in hyperhidrosis treatment. Discomfort depends above all on the anatomical area treated, the patient's level of apprehension and the doctor's expertise. Good preparation, clear information and an adapted protocol (local anaesthesia if needed) allow everyone to benefit from treatment under optimal conditions, regardless of sex.
