Wife menstrual cycle is 10 to 13 days early from previous cycle , please tell what might be the problem and remedy she is of 34 years, ?

Happens sometimes: An early menstrual period may be caused by changes in hormone levels, which can be due to anxiety, stress, overworking, intense exercise, fatigue, or excessive weight gain/loss. If pregnancy happens, implantation bleeding occurring 9-14 days after conception happens sometimes, and can last long enough to mimic an early period. A doctor can check, if symptoms are worrisome or recur.