welcome to healthcare magi forum
thank you for your query
i understand your concern about pimple.
you should apply clindamycin
it is very effective in pimple that you have.
do not use tooth paste or other non medical cream .
it may cause skin irritation and damage.
better to consult dermatologist
for proper treatment.
please do not scratch the scab from the lesion.
chance of black spot are high when you scratch the lesion.
i hope i answered your query