Applying deodorant directly to wet skin is a widespread mistake that significantly reduces the cosmetic product's effectiveness, according to pharmacist Eduardo Palomero.
Palomero explained in an interview with Spanish publication El Economista that many people routinely put on deodorant immediately after stepping out of the shower or right after a workout to cover up sweat odor. However, the specialist stressed that cosmetic deodorants must never be applied to damp skin because excess moisture prevents the active components from working effectively.
When skin is wet, surface water forms a liquid barrier that dilutes active cosmetic ingredients and keeps them from properly bonding with the epidermis. This dilution hampers the product's ability to neutralize odor or reduce perspiration throughout the day.
Deodorants typically rely on antimicrobial agents to target odor-causing bacteria, while antiperspirants use aluminum-based compounds to temporarily block sweat ducts. For both product types, skin dryness is essential so that active chemical agents can settle evenly on the surface without being washed away by surface moisture.
Proper application techniques
To achieve optimal results, Palomero stated that deodorant should ideally always be applied to clean, dry skin. He noted that the morning is the best time for application, as this gives active ingredients sufficient time to take full effect before daily movement and perspiration begin.
The pharmacist also cautioned against applying excessive amounts of product. For roll-on deodorants, passing the ball across the skin just a couple of times provides adequate coverage. For aerosol sprays, users should shake the container thoroughly before spraying from a distance of about 15 centimeters.
Roll-on formulations deliver a liquid film directly to the skin via a rotating sphere, requiring time to dry before dressing. Aerosol sprays deliver microscopic particles suspended in gas, which require proper distance during application to ensure an even distribution without creating localized irritation or buildup.
Other skin health factors
Proper skin care routines and potential environmental triggers have also been highlighted by other medical experts. Previously, dermatologist Irina Kotova identified another unobvious cause of skin issues, stating that pustular eruptions can be triggered by exposure to chlorinated water.
Pustular eruptions are small, inflamed lesions filled with pus that often appear when hair follicles or skin pores become irritated or infected. Chlorinated water, commonly used to disinfect swimming pools and tap water systems, can strip away the skin's natural lipid barrier, causing dryness and leaving pores susceptible to bacterial contamination.
Dermatologists recommend rinsing with fresh water after swimming and applying gentle moisturizers to protect the skin barrier against chlorine-induced irritation.
