Common symptoms of fungal infections include itching, redness, scaling, and rash on the skin. For nail fungus, symptoms may include thickening, discoloration, and crumbling of the nails. In vaginal yeast infections, symptoms often include itching, burning, and abnormal discharge. In severe or systemic fungal infections, symptoms can be more severe and may include fever, fatigue, and organ-specific symptoms. Early detection and treatment can help alleviate these symptoms.