According to Tallis, some of the symptom clusters shared with being lovestruck include:

Whatever its cause, Morgellons disease joins a growing list of symptom clusters that public health officials have been forced to examine closely in part because of the organizing power and unprecedented reach of the Internet.

All symptom clusters (primary target symptom: nightmares)

Alvir JM, Thys-Jacobs S. Premenstrual and menstrual symptom clusters and response to calcium treatment.

In this dimension, "symptom clusters" are "useful descriptors" which presents the patient's "symptom patterns in terms of the patient's personal experience of his or her prevailing difficulties".

Ridner SH: Quality of life and a symptom cluster associated with breast cancer treatment-related lymphedema.

Pain, difficulty breathing, and fatigue form a common symptom cluster.

The first symptom cluster, re-experiencing the event, is a mixture of physical and psychological reactions someone goes through after the critical event has occurred.

The second symptom cluster, avoidance of stimuli associated with the event and numbing of general responsiveness, occurs when someone avoids anything that could possibly trigger memories of the critical event.

The third symptom cluster, increased arousal, produces anxiety-driven responses, such as trouble sleeping, excessive anger and irritability, hypervigilance, poor concentration, and exaggerated startle response.