Tinea unguium and onychomycosis are the same, these two are exactly the same disease, with no differences, only that their names are different. Tinea unguium is more commonly used in clinical diagnosis, while onychomycosis is a common term used by the public. If you have tinea unguium, also known as onychomycosis, it is crucial to actively seek treatment to completely cure it, because this disease is contagious. If not treated promptly, it can easily spread from person to person. Always pay attention to hygiene and cleanliness.