Hi doc , My mother is undergoing treatment for ear as she is complaining of not able to hear clearly in one ear . After checking with doctor we came to know that there is pus formation on ear drum and there was a hole on ear drum. She was taking treatment and later the hole was cured and pus also was gone .Later again she started facing same issue and  the doctor says there is pus formed covering her ear drum which causes her hearing issue . Why is the pus formation still happening even after she completes the course of Medicine ?? What is this issue and how to completely cure this issue ? She is 59 and this is the only issue she has .no bp no sugar. Thanks in advance .