Hydrofluoric (HF) acid, one of the strongest inorganic acids, is used mainly for industrial purposes (eg, glass etching, metal cleaning, electronics manufacturing). Hydrofluoric acid also may be found in home rust removers. Exposure usually is unintentional and often is due to inadequate use of protective measures.
It can be difficult to pinpoint the exact cause of a burning smell in nose. Thatâs because the potential causes are many. One possible explanation for this symptom is sinus congestion. A lot of people suffer from this, so you shouldnât rule it out. People with sinus problems sometimes smell things that arenât there, too.
Yellow runny liquid from nose like a nosebleed but no blood! I have suffered for the last couple of yrs with sinus infections every few weeks. Recently (over Christmas) I had my last infection, had ABs and nose drops etc.... The infection seemed to clear up although I did get left with a horrible smoky smell in my nose.