Allergie de contact

What is Contact Allergy ? Contact allergy is an allergic skin reaction from coming into contact with a substance that is usually harmless. What are the common manifestations of contact allergy ? The commonest manifestation is an itchy rash that develops over a few days, after skin contact with a substance. The affected area first…

Acné

Dr Christophe Hsu – dermatologist. Geneva, Switzerland Acne Vulgaris What is the cause of acne? There are several causes of acne. One theory is that when the male hormone level (testosterone) increases during puberty, the skin of an acne prone person reacts to the hormone and produces excess sebum. No one knows why some individual’s…