My feet are very dry tried many lotions including vaseline , and eucerin ?

Dry skin: You need something with urea in it which your doctor can tell you what's best. Many otc products don't have urea in them.

Try wrapping your : Feet in Saran wrap then put socks on prior to bedtime after applying those same lotions and potions...

Lotions and ointment: Dry skin may or may not respond to simples lotions and or ointments. Lotions are water base products whereas ointments are oil base. Depending on why your skin is dry either of these, or neither, may help. If you have tried a variety of topical treatments perhaps the problem lies elsewhere. Diet, hydration, vitamin deficiency can all cause dry skin.