I have developed a white layer on my head which has cracks. Do I need to worry? (Photo)

Its my 10th day of hair transplant and I have developed a white layer on my head which has cracks , Please check Uploaded pictures does it look fine ?? Or its a concern ?? My doc told me to use minoxidil from the day of surgery twice a day I used 10% Minoxidil solution but after 3 days I phased few complications life low BP , fast pulse rate and irregular bp after stopping Minoxidil solution it all went away