thanks for your query.
Its nothing but the preauricular sinus
or pit. Its a developmental defects while developing ears before birth.
Sometime it will infect and giving rise to discharge or pus.
If you dont want this, better to have excision of it under local anaesthesia, its a minor procedure hardly take 15-20 min.
Now its inflammed so take any broadspectrum antibiotic like amoxiclav
, anti inflammatory like Chymoral
plus to resolve the inflammation.
Thanks, take care.