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Need to change Bandage can let people know bandage efficacy exhausted and need to get a new bandage.
The main functions of band-aid, an indispensible emergency supply in daily life, are to absorb the exudation, keep the wound dry, and prevent infection.
But nowadays, while using the band-aid it happens to have overlapping of fabric, which prevents the normal exudation of moisture and sweat from penetrating. That will make it less comfortable and easy to cause infection.
Guo Ruizhen Cao Jin Wang Xinyao Chen Jiangnan