What do you mean by external application?

In homoeopathy, an external application refers to the use of a homoeopathic medicine applied directly to the body’s surface or mucous membranes—rather than taken internally—to act on a local area.

Key Points
Definition: Any homoeopathic preparation (mother tincture, ointment, lotion, liniment, glycerole, medicated oil, etc.) applied to the skin, eyes, ears, nose, or other external parts of the body.
Purpose:
To address local symptoms such as wounds, ulcers, eruptions, inflammation, or pain.
Often used in injuries, burns, or skin conditions where local relief is needed.
Forms:
Lotions & Liniments – liquid preparations for washing or rubbing on the skin
Ointments & Creams – semi-solid bases for prolonged contact
Poultices & Plasters – medicated coverings for wounds or swellings
Medicated Oils – for massage or topical absorption
Hahnemann’s View in the Organon
In the 5th edition (Aphorisms 196–203), Hahnemann warned against suppressive local treatment for chronic diseases, as it could drive the disease inward.
In the 6th edition (Aphorisms 284–285), he allowed external application of the same remedy given internally, especially in obstinate or localized cases, to enhance the curative effect.

💡 In short: In homoeopathy, external application means applying the indicated remedy directly to the affected part, usually alongside internal treatment, to support healing without suppressing the disease.