Using a skin moisturizer depends on your skin type, on any skin problem(s) you had in the past and still recurring in the present.
Below is guidelines about skin moisturizer you can follow :
1. For dry skin – a heavy, oil-based moisturizer is apt for it. It must contain propylene glycol or urea so that the moisturizer can keep the skin moist.
2. For oily skin – as you know, oily skins are more prone to acne and breakouts. In such a case, any light moisturizer can be used to protect your skin after washing. It should be oil-free, water-based and non-comedogenic (not clogging the pores) – very important point to look out in the moisturizer.
3. For normal skin – as this type of skin is neither too oily nor too dry, the moisturizer to be used should be water-based, light and non-greasy. The contents are cetyl alcohol, or cyclomethicone, or ingredients derived from silicon.
4. For sensitive skin – the moisturizer for such a skin should not contain any fragrance or dye; it will harm the skin in the long run.
5. For mature skin – an oil-based moisturizer containing petrolatum (base) with alpha hydroxyl acids or lactic acid should be used to keep the skin well-hydrated and soft.
Always make sure which skin moisturizer would fit your skin before buying the product.