that a topical steroid
"cream" is specified, is that it is a pharmaceutical
, which means that it has certain well-defined properties, and those specific
properties are such that it will do a certain thing - in this case, weaken
the structure of the skin so that it can be stretched. That is why a steroid
is specified, because a steroid - and not
just grease or papaw - has this property.
Further than that, not just any
steroid preparation will have this effect. Those sold "over the counter" are specifically chosen so as not
to have this effect because it should be pretty self-evident that something which weakens the structure of the skin and makes it more susceptible to infections and which can affect the whole body
in similar respects if used excessively, could be quite dangerous.
And one further point - the fact that a "cream" is referred to, indicates that a lot of important further information is missing from whatever source in which you found it, because the correct
form of the steroid for this purpose, is an ointment
which penetrates the skin more effectively and (if correctly applied - another critical point) - is less likely to be spread to areas other than where the effect is desired.
All in all, the important thing in your situation is to read
as many as possible of our previous discussions here which explain in detail how
to stretch and under what conditions the steroid might be important. Do not
ever imagine that if you read one or two you will have the "whole picture" by any means. There are now fifty
discussions listed on the first "index" page from where you posted, and fifty on the second index page. Of course, there are plenty more older index pages with fifty each, but I suggest you set to work reading everything from the first two index pages for a start.
doing this, paying due attention to everything you read, you are still unsure of anything, do come back to this discussion and ask.