After Medical University School in Basel, Switzerland, Dr. Kreyden passed surgery formation before becoming a specialist in the field of Dermatology. He established and headed the first hyperhidrosis consultation hour in Switzerland. In his Private Clinic “Methininserhof” in Muttenz near Basel, Switzerland, his special interests are Dermatosurgery and Lasers, Aesthetic Dermatology and Hyperhidrosis. He published numerous scientific works and edited or co-authored several books or book chapters in the field of Hyperhidrosis as well as Aesthetic Dermatology. Dr. Kreyden is a regular invited speaker and/or chairman on international Congresses as well as instructor in workshops and training-courses on different topics of Aesthetic Dermatology such as BTX-A, Fillers, deep chemical peels. He is board member of numerous international dermatological or aesthetic societies, past president of ESCAD, founder and President of the Swiss Society of Esthetic Society (SSEDS) and becoming Vice-President of the International Peeling Society (IPS) in 2019. In 2007 he received “Who is Who”-Award for his scientific work in Dermatology and Aesthetic Medicine and is since then listed.