Can I use caboki or toppik hair building fiber on FUT scar within a month after hair transplant? (Photos)

After one month, you can do almost anything including using Toppik.  Artifical hair is not approved in the United States as it poses risks of infection and scarring.  SMP may be another option.

The best treatment for this is scalp micropigmentation. I have extensively published on this technique and on the website you can see many examples of patients who had this done for scars of all type (see below)