Facial hair growing is a natural and common phenomenon and that may be caused due to the following reasons - 

1.Hormonal imbalance 

2.Irregular menstrual cycle 

3.Several types of medicine side effects .

Though shaving and waxing are the common methods to get rid of such facial hairs but those are not recommended for sensitive skin of women .

Here are some Home remedies to remove facial hair naturally 

1.Mix half bowl of Besan or chick peas powder,half cup of milk ,half teaspoon of turmeric and little amount cream and make it a paste ,apply that on the face and leave that for 15 minutes to 30 minutes and rub just the opposite direction of the hair growth ,though sometime it may be irritating but its very much effective,

2.Peel and crush potatoes and filter the liquid ,mix chana dal overnight soaked ,milk and honey ,apply on the face and give that a gentle rub to get rid of facial hair naturally .