Guys keep your ears clean(clean em weekly), dont share your IEM'S!!! and following a hygienic and healthy lifestyle. Almost all ENT problems will go away
. I had this problem quite a lot about 2yrs back, it's all gone now.
Basically try to exercise for at least 1 hour daily and such small problems will stop occurring completely.
For some people high altitude to low altitude acclimatization takes 2-3 months so keep that in mind too.