When performed by a qualified doctor using small calibre sterile needles in an aseptic environment, there is negligible long-term negative effects on the skin barrier function. The risk of scarring will be very low.
However, if you have a pre-existing skin condition such as eczema, do let your doctor know beforehand so that a thorough assessment of your suitability and overall skin condition to undergo injectable skin booster can be made. This also applies to those who are prone to excessive scarring such as keloid-prone.
If you are unsure or in doubt, do consult your doctor first before going for these skin booster treatments.