Henrik Sjogren, a Swedish ophthalmologist, left an indelible mark on the medical world with his groundbreaking discovery of Sjogrens syndrome in 1933. His birthday is celebrated as World’s Sjogrens Day, which is on 23rd July. Despite his humble beginnings, his passion for understanding medical conditions and his relentless pursuit of knowledge led to the identification of a chronic autoimmune disorder that affects millions worldwide. Born on July 23rd, 1899, in Koping, Sweden, Henrik Sjogrens early life was marked by financial hardships. Despite these challenges, his unwavering determination led him to pursue a career in medicine. He attended the prestigious Karolinska Institute in Stockholm and obtained his medical degree in 1929. During his time at the institute, Sjogren displayed an insatiable curiosity and a passion for ophthalmology.  In 1930, Henrik Sjogren made a groundbreaking observation while studying the case of a 42-year-old woman who exhibited chronic dryness in her eyes and mouth. Intrigued by the unusual combination of symptoms, he embarked on further research. Sjogren collected data from numerous patients displaying similar symptoms and 1933 published his seminal work on what would later become known as Sjogrens syndrome.  Sjogrens syndrome is an autoimmune disorder characterized by the immune system attacking and damaging moisture-producing glands, leading to eye and mouth dryness. Additionally, it can affect other parts of the body, causing joint pain and fatigue. Henrik Sjogrens legacy extends far beyond his name attached to the syndrome he discovered. His contributions to the medical field, particularly ophthalmology, continue to shape modern medical practices. Sjogrens groundbreaking research paved the way for further studies into autoimmune disorders and opened new avenues of treatment and research.  Today, Sjogrens syndrome affects millions of people worldwide, predominantly women. By raising awareness about the condition and promoting research, Henrik Sjogrens work has led to improved patient outcomes and a better understanding of autoimmune diseases overall.