Hello and hope you are doing well.
Noting serious it's most probably a pimple. You could apply warm compress and for pain relief you can use OTC Tylenol (acetaminophen). Apply a local antibiotic as suggested. If these measures don't help, you may need systemic antibiotics. If it persists consult your doctor.
Hope this helped and do keep us posted.
I had something similar and have read many others posts about this also. My doc told me to put Neosporin on it and inside the end of my nose. That seemed to help.
Another doc also gave me a prescription for Bactroban (?)