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I would be sceptical a tight hair style would cause this. However given your age your skin should be elastic and therefore return to normal. You should however ensure you moisturise regularly and if you feel a tight ponytail caused it, indeed avoid this moving forward.
Does that answer your question?
Okay thanks. Probably just a few months.
Indeed sunbathing will damage your skin. So yes, in theory it will effect how the skin repairs. Given your age you should be fine.
That is my pleasure, I wish you all the best.