It is best not to use band-aids directly in the following situations:
1. Small and deep wounds cannot be pasted.
2. The wound of animal bite cannot be pasted.
3. All kinds of skin boils cannot be pasted.
4. It is not possible to paste on heavily polluted wounds.
5. No need to paste for minor scratches on the epidermis.
6. People with severe wounds and contaminated wounds.
7. Injured by nails, knife points, etc.
8. When the wound is not clean or there are foreign bodies in the wound.
9. When ulceration or yellow water appears after scald.
10. Wounds that have been contaminated or infected, or wounds with secretions or pus on the wound, should not be used.