Hi, My Mum Is Quite Ill And Has A Variety

Hi,
My mum is quite ill and has a variety of different symptoms which her doctor treats individually. I worry they are not treating her holistically and think they all may be connected. Here are her symptoms:
-anaemia - recent hemoglobin levels were 5.6.
-recurrent infections - numerous big abcesses/boils that are difficult to treat
-IBS
- lots of food intolerances
-diverticulitis
-cat & dust allergy/hay fever
-diverticulitis
-Rosacea
-

This is just off the top of my head So there could be more, she's 49 and overweight.

Thanks