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Creams
Creams often balance spreadability with moisturization and can work well over moderate surface areas.
Gels
Gels often feel lighter and dry faster. Many diclofenac products use gel formats.
Balms
Balms are usually richer and more occlusive, often with oils or waxes. They may feel heavier on skin.
Roll-ons
Roll-ons reduce hand contact and can be convenient for travel or quick application, though they may be less practical over large areas.