Dermal fillers are not for everyone.
Injections should be avoided in areas where infections are present or the skin is swollen – e.g. active acne, cold sores. This will reduce the risk of infection at the injection site after the treatment.
If you have even the slightest allergic reaction to a particular filler, it cannot be used and you will need to use a different brand.
If you suffered from bad allergies, particularly to gram-positive bacteria.
If you suffered from bad drug allergies, that have required in-hospital treatment.
Dermal fillers have not been tested in pregnant women, so their use would normally be not advised by practitioners if you are pregnant.
If you are breastfeeding you should not have a dermal filler treatment.
If you are under 18 years of age you should not use fillers.