What causes sensitization in relation to chemical substances?

Sensitization is primarily caused by repeated exposure to a chemical. When an individual comes into contact with a sensitizing agent multiple times, their immune system may become increasingly reactive to that substance, leading to an allergic reaction. This process can occur even if initial applications of the chemical are tolerated without any adverse effects.

In the context of chemical products used in beauty and cosmetic applications, sensitization can occur with hair dyes, relaxers, or other chemical texturizers. The first exposure might not cause any evident reaction, but with subsequent uses, the body may recognize that chemical as a threat, resulting in symptoms such as redness, itching, or swelling upon later exposure.

Sensitivity can develop over time, making responsible use and awareness of exposure critical for those working with or using these chemical substances in beauty practices.