This is a cornerstone reference book. While the full 2020 edition is a paid publication on Elsevier , you can find a comprehensive sample chapter on clinical examination and diagnostic reasoning at Elsevier-Masson.
For a more practical, protocol-oriented approach, the Government of Canada offers a guide on examining skin, hair, and nails, including common types of skin lesions and their associations with systemic diseases. Download Guide l'examen clinique diagnostic dermatologie pdf
A detailed lecture-style PDF covering general and dermatological physical exams (including mucous membranes and nails) is available at Manuel Universitaire . This is a cornerstone reference book
The French Society of Dermatology (SFD) provides a focused technical guide on how to conduct a physical exam, including the importance of lighting and identifying "elementary lesions". Download Guide l'examen clinique diagnostic dermatologie pdf