Unusual or strange behavior is behavior that is not appropriate to the circumstances. It occurs when a person is unnaturally moody, aggressive, euphoric, or mild-tempered. Fluctuations in mood from time to time are normal. However, unusual reactions to events may be a sign of a medical or mental disorder. Some examples are being happy to hear tragic news or being nonchalant in situations that would normally cause stress or aggravation.
Some health conditions can affect your personality and make you act in ways that are out of character for you. Check out these conditions!