Ultrasensitive c-reactive protein elevation of 11.9 is a mild elevation. Elevated ultrasensitive C-reactive protein is mainly seen in infectious diseases, such as respiratory, gastrointestinal and urinary tract infections caused by bacteria, viruses and fungi. When the infection is under control, the ultra-sensitive C-reactive protein will gradually decrease. Rheumatic immune diseases can also cause elevated ultra-sensitive C-reactive protein, such as rheumatoid arthritis, vasculitis, dermatomyositis. Tumors, cardiovascular diseases, and blood diseases can also cause elevated ultrasensitive C-reactive protein. Therefore, the ultrasensitive C-reactive protein of 11.9 indicates that it exceeds the normal value, and it is necessary to go to the hospital to find out the cause, treat the cause of the disease, and review the ultrasensitive C-reactive protein regularly.