Gently clean the area, leave it alone, and avoid aggressive treatments. Keep necklaces, collars, hair, or costume materials from repeatedly rubbing against it.
Tomorrow: If necessary, use minimal makeup around the area rather than aggressively covering the growth. Avoid touching or picking it during the recital.
After the recital: If the bump is still present and looks spiky or thread-like, arrange a routine appointment with a primary care clinician or dermatologist.
If possible, take a clear photograph in good lighting. Another photograph a few days later can help you notice