What is sub-health of the body? What are the specific symptoms?

Sub-health refers to a state in which the human body is between health and disease. People in sub-health state can't reach the health standard, which is characterized by the decline of vitality, function and adaptability in a certain period of time, but it doesn't meet the clinical or subclinical diagnostic criteria of modern medicine.

Specific symptoms of physical sub-health:

Physically, it can be manifested as fatigue, muscle joint pain, dizziness, headache, palpitation, chest tightness, sleep disorder, loss of appetite, epigastric discomfort, loose stool constipation, sexual dysfunction, fear of cold and heat, easy to catch a cold, dry eyes and so on. Psychologically, it can be manifested as depression, distraction, impatience, irritability, fear and timidity, memory loss, inattention, listlessness and unresponsiveness. Social communication can be manifested in the following aspects: unable to assume the corresponding social role, difficult to work and study, unable to correctly handle interpersonal and family relationships, and difficult to conduct normal social communication.