Armpits are dark, moist places where it is easy for bacteria to grow. The pH of most skin on the body is around 5.5. It forms a naturally acidic layer, known as the acid mantle, which helps to protect it against bacteria. Skin in the armpits is pH 6.5. This significant reduction in acidity makes it more susceptible to the growth of bacteria. As the bacteria metabolise (break down), they produce strong-smelling substances. Because the armpit prevents these substances from evaporating, they can lead to unpleasant body odour. Read more in sweating.
The skin on the scalp is particularly susceptible to irritation and it is important to use mild, specially formulated products for daily care and for the treatment of any conditions.
The wrong choice of shampoo is one of the main causes of scalp sensitivity. Harsh cleansers and surfactants can wash away the scalp’s acid mantle, leaving it susceptible to dryness and irritation. Some people also report having a hypersensitive or sensitive scalp after receiving treatment for skin conditions such as Atopic Dermatitis or Psoriasis.
To promote scalp and hair health, it is advisable to use a mild shampoo with a pH close to that of skin and to choose scalp and hair care products that have been tested on, and proven to be compatible with sensitive skin. Find out more about the range of mild but effective daily use shampoos from Eucerin in Eucerin DermoCapillaire.
Deodorants do not influence the amount of sweat produced, but contain substances that slow down the reproduction of odour-producing bacteria (bacteriostasis). They can also include ingredients that absorb odour-forming substances and reduce unwanted body odour. Some also contain scents and perfumes to mask unpleasant body odours.
Also known as anti-transpirants, anti-perspirants contain active substances which reduce the amount of sweat produced resulting in less dampness and less odour.
In extreme cases, known as hyperhidrosis, medical deodorants are available which combine antiseptics, antiperspirants and an acid pH to inhibit the growth of bacteria, combining effectiveness with skin compatibility. Eucerin offers a comprehensive range of spray on and roll on anti-perspirants and deodorants which are proven to be effective and which have been tested on, and proven to be compatible with, sensitive skin. Read more in Eucerin Deodorants and Anti-Transpirants and some interesting facts about the story behind the range.