单词traction-alopecia
网络: 牵拉性脱发；牵引性落发；牵引性脱发
If elastic bands and barrettes are used at all, they must not be tight. They hae been noted to cause traction alopecia.
如果用皮绳和夹子，不要太紧，他们会引起牵引性脱发。