What symptom is commonly associated with Kidney Yang deficiency?

Cold limbs are a classic symptom associated with Kidney Yang deficiency. In Traditional Chinese Medicine (TCM), Kidney Yang is considered pivotal for warmth and energy within the body. When Kidney Yang is deficient, the body's ability to regulate temperature diminishes, leading to feelings of coldness, especially in extremities such as the hands and feet. This is because Yang energy is related to warmth, vitality, and movement; its deficiency can result in a sensation of cold.

In contrast, the other symptoms listed are not typically connected to Kidney Yang deficiency. Excessive sweating usually relates to a Yin deficiency or the presence of external heat, while headaches can stem from various causes, including Qi stagnation or external pathogenic factors. Hot flashes are often associated with a hormonal imbalance or Yin deficiency, particularly in menopausal contexts, rather than a deficiency of Kidney Yang.