尾骨尖 meaning in English

apex of coccyx

With the hand ok and apparent feeling arrives ( buttock channel upside slants a side ) , the eye also can see all round the skin has grind chrysalis regularly , when standing naturally spend gently bow - backed , feel oneself is coccygeal needle in ache when sit - ups ( did afore - mentioned semiotic people already grow up 25 years old ) whether to need treatment
用手可以明显触摸到（臀沟上部偏一侧），眼睛也可看到四周皮肤有经常性的磨茧，自然站立时轻度驼背，自感作仰卧起坐时尾骨尖处疼痛（上述症状人已成年25岁）是否需要治疗？