yǒu xiē / wài yòng / zhǐ tòng / chǎn pǐn / huì / jiā rù / dī nóng dù / là jiāo sù / yǐ / chǎn shēng / wēn rè / hé / cì jī gǎn

有些外用止痛产品会加入低浓度辣椒素，以产生温热和刺激感。

Some topical pain-relief products contain low-concentration capsaicin to create a warming, stimulating sensation.