Question: what are the signs and symptoms of an internal fungal infection?
Answer: Oral Thrush. Candidiasis that develops in the mouth or throat is called “thrush.” ... 
Tiredness and Fatigue. ... 
Recurring Genital or Urinary Tract Infections. ... 
Digestive Issues. ... 
Sinus Infections. ... 
Skin and Nail Fungal Infections. ... 
Joint Pain.