This plant is a Kalanchoe, specifically it is the hybrid, Kalanchoe x houghtonii, which is the cross between K. daigremontiana and K. delagoensis. Both parents species are native to Madagascar and were formerly assigned to the now-synonymous genus, Bryophyllum, These Bryophyllum-type Kalanchoe make beautiful houseplants, but there are also weedy in greenhouse and outdoor tropical settings worldwide. The plantlets that form on the leaf margins detach and root easily, giving both parent species and the hybrid, the common names of Mother-of-Thousands, or Mother-of-Millions.
Also the plant chemistry of Kalanchoe includes a number of compound that are considered toxic, though there are also claims of various medicinal uses for these plants. Needless to say, the OP's claim for using the plants to make a tea for skin treatment should be taken with great caution and scepticism.