Which symptom is commonly associated with PTSD?

Loss of interest is a common symptom associated with post-traumatic stress disorder (PTSD). This symptom, also known as anhedonia, reflects a significant emotional and motivational shift often seen in individuals who have experienced traumatic events. Those with PTSD may find that activities they once enjoyed now bring them little to no pleasure, leading to withdrawal from social interactions and hobbies. This is part of a larger pattern of mood disturbances that can include persistent negative thoughts and feelings about oneself or others, which can compound the distress experienced after trauma.

The other symptoms listed, while they might occur in various psychological conditions, are not hallmark signs of PTSD. For example, increased energy can be indicative of other issues such as mania or anxiety, while excessive laughing is not typically seen in PTSD, which is more focused on emotional numbing and distress. Night sweats can be a symptom of many conditions, including anxiety and certain medical disorders, but they are not specifically tied to the key diagnostic criteria for PTSD as commonly recognized. Thus, the correct interpretation of the symptoms associated with PTSD supports loss of interest as a defining feature in those affected by the disorder.