Is a body temperature of 35.5°C normal?

　　A body temperature of 35.5°C is considered subnormal—not within the standard range of normal body temperature. It may result from external factors such as measurement error or exposure to cold environments, or it may be associated with abnormal metabolic function. Clinical judgment should be made only after considering subjective symptoms and ruling out confounding factors. If low body temperature persists over time and is accompanied by fatigue or general discomfort, prompt medical evaluation is advised.

　　In healthy individuals, axillary (underarm) temperature typically ranges between 36°C and 37°C; thus, 35.5°C falls into the category of hypothermia. Measurement inaccuracies may arise from insufficient measurement duration, failure to dry sweat from the axilla prior to measurement, or excessively low ambient temperature—all of which can yield falsely low readings. If the low reading results solely from environmental or technical factors, re-measurement after adequate warming usually yields a normal temperature. In such cases, specific pharmacological treatment is generally unnecessary; simply removing oneself from cold environments and adding appropriate layers of clothing is sufficient.

　　If the temperature remains persistently at 35.5°C even after excluding measurement errors, underlying pathological causes must be considered. These include hypothyroidism, constitutional weakness, or inadequate nutritional intake—all of which can contribute to hypothermia. Addressing the underlying condition through targeted interventions often improves the low-temperature state. Persistent hypothermia accompanied by symptoms such as lethargy, cold extremities, or worsening chills warrants urgent clinical attention to identify and manage the root cause.

　　In daily life, maintaining adequate body warmth, moderately increasing intake of nutrient-dense, calorie-rich foods, engaging in gentle physical activity to promote circulation, and avoiding prolonged exposure to cold or damp environments all support the maintenance of a stable basal body temperature.