There does not appear to be strong public confirmation that Tracy Townsend is wearing a wig, or why she would be wearing one. That matters.
What the searcher wants
Most people typing this query are reacting to a TV appearance and trying to explain a change in hair shape, volume, or texture.
What can be said responsibly
TV hair can change for many reasons: styling, extensions, lighting, protective styles, medical privacy, personal preference, or a wig. Without a direct statement, it is only speculation.
Bottom line
If Tracy Townsend has not publicly explained her hair, the responsible answer is simple: we do not know. A visible style change is not proof of a wig.