What are the hazards to the human body caused by long-term soldering with flux?

Tell the truth! The hazards...are there, but not serious. As long as you pay attention to protecting your face and hands to prevent injuries from the tin slag splashed out by the tin explosion.

As for the smell, it won’t be a big deal. The main solvent components of the flux are nothing more than isopropyl alcohol, methanol, anhydrous ethanol, etc. These are all analytically pure liquids of industrial alcohol type! As a joke, "As long as you don't drink from him, you'll be fine." Haha

Don't worry!