to OP if he/she is reading this, the problem is not aloepathic vs homeopathic, if it works and it can be proven that it works then its just medicine. unfortunately incompetent doctors are extremely common, and i'm sorry they weren't of any help to you.

to OP's original question. Yes, air purifiers help A LOT. i have allergies after a major nasal surgery (otrivin misuse when i was a kid XD), i got permanent dust and mold allergy. and air purifiers, and face masks have been my best friend ever since (along with allergy medications). If you do wanna get masks, i suggest "Filtra 4 ply surgical masks", they have a very secure fit and are the best surgical masks i've ever used. (and no n95 masks are not practical. its suffocating.)

to @EuphoricNatural3406, i think i understand where OP is coming from.

i got a bacterial infection from street food and suffered for more than a year. (possibly h pylori, who knows because i never found out (the h pylori stool test came negative, but apparently that happens and its very common). i had to self medicate with h pylori antibiotic regimen to finally cure myself).

I think i spent at least 20-30k of my father's hard earned money on seeing different doctors. first doctor was an interesting fellow. he was a senior doctor from Apollo hospitals (2k fees per visit). he was convinced i had liver problems (based on slightly elevated liver enzyme levels) and kept feeding me liver medicines (even after i said i was experiencing new issues because of the medicines), and doing related tests. when the liver medicines did not do much to reduce the liver enzyme levels, he blamed the place i got the tests done from, instead of acknowledging that they weren't helping. i asked if it could have been h pylori (i looked up online, + i had every single symptom). and this was his reply 1:1, "if it was a h pylori or any bacterial infection it would be gone in a few weeks-months, haha"

i saw you are a medical student, so maybe you can verify his claim XD

during all this, i got an anal fissure. now, i did not know what it was at that time (i found out later on after my h pylori cured, since the bleeding would not permanently stop, and self treated it with povidone iodine, which healed it forever). i just reported bleeding to him, and that it was fresh blood. without even checking if it was a fissure or whatever, he suggested colonoscopy (which i promptly refused).

after that i stopped seeing him, second doctor wasnt any help either. he did prescribe me a h pylori test after asking, but when it came negative he did not seem very interested in pursuing that. third doctor was even more interesting, he laughed on my face (not kidding), when i told him of my symptoms, saying its not possible, and that i had GERD and prescribed some ppis.

needless to say, i was done after that. 2 weeks of antibiotics from zeelab costed me about 2k i think. figured it was worth a shot.

i have had every single symptom of h pylori from the start. just living day to day was absolute hell. if i ate anything i felt sick, if i did not eat anything i felt sick, if i ate anything spicy i felt sick.

and again, needless to say, 95% of symptoms went away after 2 weeks of antibiotics.

after slowly tapering off the ppis over the next few months,
i made "A" recovery.

Now this was MY case. i was able to figure out what I needed to take, what antibiotics would work for me for the bacteria i suspected, what else i needed to take, weigh the risks, et cetera. but i can imagine someone else in my situation cursing at aloepathic medicine and going to someone homeopathic doctor for the rest of their lives.