A multifunctional polymer-free clay products having a clay, a zwitterion, a silver compound, and, an analgesic. The multifunctional polymer-free clay product provides antimicrobial and pain relieving properties. Method of treatment of bums using the multifunctional polymer-tree clay product having antimicrobial and pain relieving properties. Methods of preparing multifunctional polymer-free clay products having a clay, a zwitterion, a silver compounds and, an analgesic.