Benefits of Rosewater 

* Suitable even on sensitive skin

* Reduce surface oiliness of the face

* Treat acne skin

* Perfect for dry skin

* Has a calming effect (especially helpful for sunburn, acne, eczema & dry skin)

Rose water is great for all skin types. It has gentle anti-bacterial properties to it and can help relieve redness and inflammation in the skin. This makes it a great product to use for those who suffer with acne or chronic redness. It won't dry out your skin, so it's great for those with dry skin, too. It has been known to help with under-eye circles and softening of early signs of aging. It also is great to use on skin irritations, such as bug bites or sun burns.

With reference to: http://skincare.about.com/od/spa/a/Rose-Water-Recipe-And-Skin-Benefits.htm

A few ways how roswwater works wonders for you
1. Since rose oil has anti-inflammatory properties, using rose water can help in reducing the redness from irritated or over-heated skin.
2. It is a great cleanser and aids in removing oil and dirt accumulated in clogged pores. Thus preventing acne and pimples.
3. It has astringent like properties, which is why it is used after facials and clean ups to close open pores. Applying rose water after steaming tightens capillaries, reduces redness and blotchiness.
4. The aroma of roses is said to be a powerful mood enhancer. It rids you of feelings of anxiety and promotes emotional wellbeing, thereby making you look relaxed. Since it is de-stressing, it helps you sleep better which means you will wake up feeling fresh.
5. The best and easiest way to use it is to apply it at night. It helps clear all impurities that your face has collected through the day.

With reference to: http://timesofindia.indiatimes.com/life-style/beauty/Benefits-of-rose-water/articleshow/14024523.cms