Ferrum Phosphoricum: Ferrum Phosphoricum for the early stages of many illnesses which may take several days to develop. They tend to be flopped out. The person is flushed, but not feverish. Face alternately red and pale. They are irritable, excitable, but changeable, and may become depressed. This person will usually have been very affectionate, yet strong willed, even dictatorial, when healthy.