Hi,thank you for posting your query on health care magic.
Looking at description of Crystals on ear drum,given by your doctor,it can occur in case of an acute
ear infection in following ways:
1.)The ear drum may bulge in some case of acute middle ear infection giving the picture of bubble on ear drum.In this case it may lead to mild rupture and lead to
ear discharge.
2.)Bubble on the ear drum-it occurs in Bullous Myringitis-It is a viral infection of ear drum.
3.)Bubbles inside your ear drum-in case of
Secretory otitis Media-In infection of middle ear,secretions may collect behind the ear drum giving a picture of Bubbles under ear drum.
In such a case,you may get relief by taking Oral decongestant like containing Phenyephrine,Nasal decongestant like
Xylometazoline Nasal drops,Antibiotic ear drops like containing
Ciprofloxacin,Analgesic like Ibuprofen and Antihistaminic like Cetrizine.
Hope this answers your question.Get well soon.