R46: Symptoms and signs involving appearance and behaviour

The group of conditions defined under "Symptoms and signs involving appearance and behaviour" generally deals with observable changes in a patient's usual physical characteristics or behavioural patterns that are unusual or not readily explainable. These symptoms can be noticed by the individual, their family, friends, or healthcare professionals. Changes in appearance may include abnormal pallor, flushed complexion, or unexplained weight loss or gain. Behavioural symptoms may involve unusual degrees of fear, irritability, emotional lability, or peculiar postures. The causes can be diverse ranging from psychological issues to underlying physical illnesses. These symptoms do not provide a specific diagnosis but are important indicators prompting further medical investigation. Disease progression can vary widely, depending on the underlying cause. Various body systems may be affected, again depending on the root cause. However, it's important to remember that these symptoms and signs often indicate the presence of an underlying health issue that needs medical attention.