After a lifetime of witnessing what happened as sick people became well, Constantine Hering, the father of American Homeopathy, observed that the curative process tends to progress in three directions. The most recent symptoms disappear first, followed chronologically by symptoms that occurred earlier in life.
The Samuel Hahnemann Monument in Washington, D.C.
For example, if a person with eczema was treated with suppressive creams after which they developed allergies, in the process of healing, once the allergies are cleared, the eczema will return briefly.
Symptoms move from within to without, from the most vital to the least vital functions. So someone with disease in a vital organ may later experience skin eruptions as the healing process continues. Symptoms also disappear from above to below, starting with the head and continuing down to the hands and feet. This can be observed very clearly with skin disorders.