Health is a complex and multi-faceted concept that encompasses both physical and mental well-being. Here are some signs that someone may be healthy: Physical appearance: A healthy person may have a healthy weight, good posture, clear skin, and a bright and alert appearance. Energy level: A healthy person typically has good energy levels, is able to carry out daily activities with ease, and has a good sleep pattern. Mental well-being: A healthy person is able to handle stress and has a positive outlook on life, a strong sense of self-esteem, and a good social support system. Nutrition: A healthy person is likely to have a balanced and nutritious diet, without overeating or undereating, and to avoid excessive alcohol and drug use. Exercise: A healthy person is likely to engage in regular physical activity and exercise, which can help improve cardiovascular health, muscle strength, and flexibility. Medical indicators: A healthy person may have normal blood pressure, cholesterol, and glucose levels, and may have a low risk of developing chronic diseases such as diabetes, heart disease, and certain cancers. It's worth noting that health is not just about the absence of disease, but rather a state of complete physical, mental, and social well-being. The presence of one or more of these signs does not guarantee that someone is completely healthy, but they may be indicators of good health. Ultimately, the best way to determine someone's health is to have a comprehensive health evaluation by a qualified healthcare professional.