IgA Nephropathy & others connected issue

29 M, have enlarged tonsils ever since puberty. Have few more medical issues. 1. IgA Nephropathy 2. Sleep apnea 3. Nose slightly bent post surgery after an accident in childhood resulting in narrow nasal cavity in left side. Breathing slightly impacted. All this results in chronic irritation at the back of the throat which causes frequent bouts of coughing regularly in daily life. Phelgm persists irrespective of season. In 2023 patient was admitted to hospital because he lost consciousness. He has been having blood in urine, also brown colour urine which lead doctors to examine his kidney. Biopsy was done then they found mild scarring on kidney and discovered IgA Nephropathy. Since then he had no symptoms related to kidney. Urine is normal, no blackouts and overall fit except for tonsillitis and swallowing issues. Whenever he swallows there is irritation at back of throat leading to coughing daily. What should be the next step? And how can these persistent symptoms cured?