Can geranium herb be applied to mucous membranes?
Geranium refers to Geranium ointment, which generally should not be applied to mucous membranes. Proper medication use should be observed.

Geranium ointment is a topical external medication primarily intended for application on the skin. It is for external use only and must not be taken orally. The ointment should be kept away from the eyes, mouth, and other mucous membrane areas to avoid irritation or injury. Geranium ointment should not be used on broken or infected skin, as this may worsen the infection or cause other adverse reactions. It is mainly used to treat skin sores, boils, carbuncles, and eczema caused by accumulation of dampness and toxicity, but it must not be applied to mucous membranes.
If Geranium preparations are undiluted or contain strongly irritating ingredients, direct application on mucous membranes may cause irritation, redness, swelling, or even more severe reactions. For severe or unclear causes of mucosal diseases, such as severe stomatitis or genital herpes, a physician should first make a diagnosis and provide an appropriate treatment plan. Self-application of Geranium products or other medications is not recommended.
In daily life, it is advisable to maintain good personal hygiene and avoid consuming overly spicy or irritating foods to promote mucosal health.