A 3-month-old boy is brought to the clinic by his mother ...

In Aconite it is usually dry, and not particularly coated. In Ferrum phos. it gives the impression of being somewhat swollen. At the commencement it is usually red, although it may have a faint white coating; by the third day it will have developed a definite coat. But in the earlier stages it is a rather darkish red, swollen looking tongue. ................
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