Mold can be misdiagnosed as seasonal allergies, chronic sinusitis, anxiety, depression, chronic fatigue syndrome, nephritis, mast cell activation syndrome, sarcoidosis, dementia, cancer … The list of symptoms that exposure to mold can cause is long because mold and it’s components create inflammation, cause immune dysfunction and can affect many systems in the body. There is no single diagnostic symptom and each individual will react differently to mold exposure based on genetic susceptibility and overall toxic burden. So you must look at the totality of the symptoms, history, and do appropriate testing.