Fluid buildup in the middle ear during an ear infection (acute otitis media) may cause the eardrum to burst (rupture). This leaves a hole in the eardrum that generally heals within 2 weeks. Surgery to place tubes (myringotomy tubes) in the eardrums also creates a hole that will usually close when the tubes are removed or fall out.
A hole in the eardrum raises the chance of damage and infection to the middle ear. Take special precautions until a doctor tells you the hole is fully healed:
WebMD Medical Reference from Healthwise