Check calcium phos, and sulphur.
keloid scars, silicea or thuja could be of service, but then as low as 6x over a long time, sligthly adjusted upwards( the plusmetode).
If those fears are left over after what you call constitutional, i would say that the rigth layer is not hit by the remedies, it is needed to use potences that is not used before, even if you go lower or higher, find the level, and it will be gone, but it could take years to take all of it.

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Homeopat MNNH Geir E.T. Marcussen
email: getm@eunet.no
http://www.homeopati.no