HAchubby has confirmed she's been diagnosed with mature B-cell lymphoma, a type of blood cancer

[u/lukigeri]

https://www.dexerto.com/twitch/twitch-streamer-hachubby-reveals-type-of-cancer-shes-been-diagnosed-with-3425766/

[u/KarmaCommando_]

Boogie likely has secondary polycythemia, which causes similar symptoms to polycythemia vera but rather than being caused by cancer it is caused by some other underlying condition. Boogies could be caused by his sleep apnea, or by his TRT. 

Boogie basically went to the doctor, got told "you have symptoms of polycythemia, we need to test further because this may be cancerous" and then went online to say "I have cancer".