Yes, you can. CBD does work on the skin too. The effects are different, though, and leverage the cannabinoid receptors accessible via the pores on your skin. However, it is advised to use the ingestion method for maximum utilization since CBD has low bioavailability. Feel free to augment yourself with creams for full effect.
That usually depends on the type of cream you use, the level of CBD concentration, and how much you apply.
According to research done on the cream, it would seem that CBD reduces intense pain, cold, itchy sensations, and sharp pains when applied to the skin. Cream application is also called topical application and refers to the fact that you have to smear it on the affected area. You can substitute lotion with CBD cream when dealing with skin disorders to combat them better. Lotions tend not to have medicinal properties, but CBD oil does.
While research is relatively limited, CBD cosmetics (done well) offer healing properties in anti-oxidant and anti-inflammatory properties to combat skin dryness and inflammation. CBD may also be suitable to curb acne-causing sebum production. Studies show that CBD could be effective in the treatment of psoriasis and eczema.