What are the differences between ointment and a cream?
Cream is water based, and as such the absorption through the skin is quick and evaporation is fast. A cream is usually very pleasant on the skin, and washes easily with water.
Ointment is oil based, and as such, absorption is slower, and there is minimal evaporation. In fact, oily ointment stays longer on the skin and seals it.
Ointment is usually less pleasant to apply (greasy).