Some people take birch along with lots of fluids for “irrigation therapy” to flush out the urinary tract. Other uses include treating arthritis, achy joints (rheumatism), loss of hair, and skin rashes. Birch is also used in “Spring cures” for “purifying the blood. s birch is one of the first trees to come into leaf it would be an obvious choice as a symbol of spring. Love and fertility goddesses, such as the northern European Frigga and Freya, have strong associations with birch. Eostre (from whom we derive the word Easter) was the Anglo Saxon goddess of spring.