When allergic reactions occur in contact with raw yam, there are several clinical options for treatment. First of all, if the local itching is obvious, you can use topical cooling and anti-itching drugs, such as compound camphor cream, compound menthol ointment, etc. If the local lesions are obvious, glucocorticoid creams can be used topically, such as hydrocortisone butyrate cream and fluticasone propionate cream. Those who have contraindications to glucocorticosteroids can choose to use topical non-steroidal drugs, such as butyl flufenamic acid ointment and ethoxybenzamide ointment. Secondly, you can take oral antihistamines, including the first generation of H1 receptor antagonists, such as chlorpheniramine and ketotifen, and the second generation of H1 receptor antagonists, such as olopatadine and fexofenadine tablets, etc. In severe cases, you can use glucocorticoids systematically.