Hyaluronic acid is widely used clinically due to its long-lasting filling effects, low immunogenicity, and reversibility after overfilling. However, inadequate pre-treatment preparation or improper technique may sometimes lead to adverse reactions in hyaluronic acid injections. Examples include erythema, ecchymosis, and swelling—the most common inflammatory responses following hyaluronic acid injections.So, what are the typical management approaches for these adverse reactions?
Erythema
Erythema is very common with hyaluronic acid injections. However, severe erythema may indicate infection or necrosis, warranting careful observation. Persistent mild erythema may be treated with intense pulsed light (IPL) therapy or intralesional steroid injections.
Ecchymosis
Generally, this is a self-limiting complication.Its occurrence relates to the needle size, injection site, and type of filler used—smaller needle sizes reduce the likelihood of ecchymosis. Additionally, areas with thinner skin, such as the eyelids and lips, have a higher risk of developing ecchymosis. Furthermore, this complication may be associated with the use of painkillers, anticoagulants, or certain foods within two weeks prior to treatment. Immediate post-procedure ice application and compression of the treated area can help prevent it.
Swelling
Since hyaluronic acid is essentially a hydrating compound that binds water molecules, this complication is particularly common. However, applying local ice packs and elevating the head after injection can help prevent swelling. Severe swelling, often associated with allergic reactions or significant bruising, may require topical corticosteroids and oral antihistamines.