Dent On The Top Back Of Head, Some Yellowish Discharge. Comes From Ear. How To Stop It ?

Hi I have a dent on the top back of my head I noticed something trickle down my back sometimes and if I wipe that area w a paper towl there is a sometimes yellowish subst nice or a beige substance left on the towel and I ve bee sick for 2 yrs and have medical and have had problems w a doctor hat did a surgery on my head beging my left ear I dnt remember why he was cutting in my head cause I was really sick and the dr sent me strait to this ent anyways he won respond to other doc request for my records and I getting worse I have to help drain whatever it is that comes ou through my ear on my left side today I notice the same thing coming out my belly button I m really upset have no doctor right now and I don t feel so good any ideas to why this is happening to me