Is premature and easy ejaculation due to Yin deficiency or Yang deficiency?
Generally, easy arousal and premature ejaculation are often caused by yin deficiency, while such symptoms rarely occur in cases of yang deficiency. A diagnosis should be made based on accompanying symptoms. If there are concerns, it is recommended to regulate the body according to one's overall condition. Detailed analysis is as follows:

In individuals with yin deficiency, insufficient yin fluids lead to internal deficiency fire, which disturbs the seminal gate, resulting in easy penile erection but poor control, leading to premature ejaculation. This is commonly accompanied by symptoms such as soreness and weakness in the lower back and knees, heat in the palms, soles, and chest, dry mouth, night sweats, dizziness, and tinnitus. The stronger the deficiency fire, the more pronounced the symptoms may become.
Yang deficiency primarily involves insufficient yang qi, typically manifesting as weak or difficult erections rather than easy arousal. Common accompanying symptoms include aversion to cold, cold limbs, frequent nighttime urination, and low energy. Even if premature ejaculation occurs, it is usually related to deficient yang qi and loss of containment, not typical of the "easy arousal and premature ejaculation" pattern.
In daily life, sexual activity should be moderated to avoid excessive depletion of kidney essence. Individuals with yin deficiency may benefit from consuming nourishing yin foods such as goji berries and lily bulbs, and should avoid spicy or stimulating foods. If symptoms persist, proper pattern differentiation must be established before medication is used, avoiding blind tonification with warming or yin-nourishing therapies that could increase bodily burden.