I wonder if there are any other anomalies. Do you have yellow or green secretions? This is to determine whether there is a secondary infection. If not, the treatment method is simple: if the wound is not big and the position is not very deep, try to open the dressing wrapped outside and keep it dry locally.
I suggest not to use Yunnan Baiyao, which will form a hard scab covering on the wound and affect the wound healing.
If you are still not at ease, you can go to the surgical clinic of the hospital to have a look.