IT might be a localized infection , acute suppurative otitis media
, or Preauricular sinus
1- If this will be an infection then apply some antibiotic topically.
2- If this is ASOM-- discharge coming from auditory canal, then antibiotic topically n orally shd be given along with supportive treatment.
3- If this will be a preauricular sinus then , it needs surgical excision.
Consult an ENT surgeon with this information. Hope this will help u.