Homeopathy does help in curing ganglions. It does so by reducing the size as well as by systemic re-absorption of the fluid from the ganglion. The results are long-lasting and usually permanent. Do however note that the outcome is better when treatment is started as early as possible and continued for a few months meant for the medicines to act.
The medicines prescribed are purely internal homeopathic medicines capable of softening the ganglion and then reabsorb the fluid from within. No external applications or corrective measure recommended.