Treating Alopecia With Nitric Acid (Acidum Nitricum)

The acid, diluted with so much olive oil as will prevent the caustic though not the stimulant effects, makes a good liniment in some cases of falling off of the hair from debility.

Treating Alopecia With Arsenic (Arsenicum)

From the effect of arsenic in improving the coat of horses, it has been plausibly thought to have a special power in promoting hair-growth, and certainly after any sources of baldness, such as syphilis, dyspepsia, or local irritation, have been treated and removed, the internal administration of small doses may be carefully carried out for a time with advantage. Hunt practised this treatment successfully.

Chronic Urticaria is often relieved under arsenic, but any evident intestinal disorder should, if possible, be remedied in the first instance.