My wife is having fully white patches in cervix?

? Candidiasis: She may be having vaginal infection. Get a thorough examination by gynecologist and also discuss treatment options.

Cervical lesions: The only way you could possibly know your wife has "white lesions on her cervix" would be that her ob/gyn told her so. Since she is already in the care of an expert, my advice is to follow his/her counsel and treatment plan to the letter.