In medical terms, ‘SX’ is an abbreviation commonly used to refer to ‘symptoms.’ Symptoms are the physical or mental features that are regarded as indicating a condition of disease, particularly such features that are apparent to the patient. For example, if a patient reports feeling feverish and having a cough, these would be noted as ‘SX’ in their medical records. The term helps healthcare professionals quickly and efficiently document and communicate about a patient’s condition.