The skin is the outer covering of the body.  So anything happening on the outside is the manifestation of somesort of internal turmoil.  Body tries to vent outside the toxins which are created inside due to any reasons. 

Therefore in Homeopathy skin manifestations are looked as good signs and usually if left untreated i.e. without any external applications will subside on their own.   The moment external applications are applied then the disease travels inside causing damage to more important vital organs.  The more usage of external applications will subside the eruptions from one part and will start appearing on another part.  This goes and the eruptions spread on almost all parts of the body.  Therefore  in Homeopathy we usually do not advise any external application to the eruptions. 

Also I have seen that there is a definate relation with Asthmatic bronchitis and eczema.  Most of the children suffering from the above disorder i.e. As.bronchitis  invariably there is a past history of supressed eczema or some sort of eruptions.  Once homeopathic treatment is started then these eruptions are brought to the surface and the child is permanently relived of his asthmatic bronchitis.  Once this is done slowly and surely the eruptions / eczema also disappears permanently.

Usually most of the skin related manifestations are heriditary.  Certain skin diseases like psoriasis, lichen planus etc are stress related.  But definately there is an answer to all these skin diseases in Homeopathy.  If the patient comes in in the initial stages there will not be much of aggravation of his skin complains but if he comes after lot of drugging and exteral applications then once he starts homeopathy there is an aggravation of his eruptions which can be very severe.  But once he goes through this stage there will be a tremendous relief  which the patient can experience. 

Treatments like psoriasis and lichen planus require lot of time to cure.  But during their treatment homeopathically the individual will be benefited in many ways.  He will be able to tackle stress and tensions in a more better way, his anxieties will be relieved to a greater extent and slowly and surely his skin will also start improving. 

At the same time extensive skin lesions of longer durations are very difficult to treat homeopathically.  Still the answer to skin ailments will vary from individual to individual.