Are these purple dark areas after my FUE hair transplant normal? (Photo)

my doctor said that those areas due to smoking ( i'm not a a heavy smoker 1 or 2 cigarettes per day and i stopped smoking totally 1 day before operation and till now ; 3 days after operation) and he gave me aspirin 100 mg for 3 days to improve the blood circulation and advised me to stop smoking) .. those photos directly after the operation , 1 day and 3 days after the operation. is this something i have to worry about? thank you in advance.