Often, oral ulcer, how to improve bad resistibility?

Often, oral ulcer, how to improve bad resistibility?

Question:

Gender: female
Age: 23
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I've often oral ulcer, one year, but no oral ulcer recently began oral ulcer, my body, my poor resistance, some how to improve my current situation? Especially in daily life, how to improve my own immune resistance?

Treatment:

Recurrent oral ulcer and said, o KouChuang recurrent or his mouth inflammation, TCM believes that, the disease for pulmonary kidney Yin kui, asthenic-heat, when the infection to retain heat source, to eat something, as zhibai dihuang pill.