Please choose the correct ending to complete the given sentence: Youth: [header] How to treat nodular acne [title] See a dermatologist. [step] Make an appointment with your dermatologist if you have large, inflamed pimples that don't heal with home care. Let the doctor know how long you've had the pimple (s) and what treatments you've tried.

Ending1: [substeps] Many dermatologists agree that a reduction in acne can help heal the pimple. If you've had the pimple as a kid and have nothing else on your body, see a doctor. Ending2: Most commonly, a dermatologist will suggest treatments that address the acne. [substeps] For instance, if you have mole growing near your ear, talk to your doctor. Ending3: They will diagnose your acne and prescribe you medication to treat the acne. If you don't have the time to see a dermatologist, see a dermatologist at your place of primary care. Ending4: Giving your doctor this information can help them properly diagnose your acne and figure out the best type of treatment for you. [substeps] Let your doctor know if you have allergies or are pregnant so they can adjust your treatment plan.

Answer format: ending1/ending2/ending3/ending4