Dear friend, welcome to HCM.
it is called folliculitis
(usually a hair follicle infection
) or a skin infection
of the nostril.
the yellow scabs clearly indicate classical staphylococcal infection
it may spread locally by contact contamination.
also it is commoner in diabetics etc. where immunity is down.
if you are a diabetic, take good care to prevent complications like cellulitis, or worse spread to danger area of face (as is called in medicine).
otherwise local anti-staphylococcal ointments would suffice (framycetin
or acitracin etc. available locally),
if you have ill health, fever etc, you may need antibiotics capsules internally.if not clearing, recurring, pl. see your doctor and get evaluated.
take care and keep me informed on your progress.
Good luck !