• This book contains bedside tests and investigations which would be handy for residents, practicing dermatologists, and faculty in institutions. • The relevance, procedural steps, and findings of the tests in various situations are highlighted in the text using appropriate images, key messages, tables, and text. • Bedside tests like KOH mount, slit-skin smear, Tzanck smear, and tissue smear are invaluable tools described in detail along with the stains used, namely Ziehl—Neelsen, Gram, and Giemsa stains. • Bedside tests would help us to make an early probable diagnosis, while bedside investigations would help us reach an early confirmatory diagnosis many times. • These processes are simple, easy to replicate, and do not require expensive equipment or techniques. • The results are available at bedside when the patient has just presented to the OPD. This reduces precious time wasted in diagnosis, thus leading to early management and disease control. It leads to maximum satisfaction in a patient with minimal wastage of time, expenses, and discomfort. • It is satisfying to the dermatology resident/dermatologist for having made a bedside diagnosis by following the simple procedures highlighted in the book.