There are many reasons why the front of the tongue is a bit dark, such as physiological factors, fungal infections, gastrointestinal problems and so on. 1. Physiological factors: If the patient eats food containing coloring, it may cause the tongue to be stained, thus leading to the phenomenon that the front of the tongue is a little black. Usually, patients can improve the thickening of tongue coating after timely cleaning, thus restoring the normal color. 2. Fungal infections: a little black in front of the tongue may also be due to fungal infections, such as Trichophyton nigrum, which can cause the tongue moss to shed slowly, and thus produce pigment in the local area, leading to a little black in front of the tongue. 3. Gastrointestinal problems: Gastrointestinal disorders, indigestion, gastrointestinal inflammation and other diseases may also lead to the phenomenon of a little black in front of the tongue, and may be accompanied by abdominal distension, vomiting, nausea and other symptoms. There are many reasons why the front of the tongue is a little black, after the symptoms, it is recommended to go to the hospital in a timely manner to improve the examination, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms, take it lightly, so as not to delay the treatment of the condition.