This is limited information and tells nothing about your skin condition which can help in planning a treatment.. Consider seeing a Dermatologist for proper diagnosis and treatment plan. However use a topical antibiotic cream on the pimple and it may help you. You can use a soothing cream like Emoderm to reduce itch.
Next Steps
Your dermatologist will decide a treatment plan for you after a consultation.
Health Tips
All the best. Avoid self-medications.