Red light therapy (RLT) is a non-invasive treatment that uses low-level red and near-infrared light for various therapeutic benefits, including skin health and pain relief. Hives, also known as urticaria, are characterized by itchy, raised welts on the skin. Some individuals wonder if RLT can cause hives.
Understanding Red Light Therapy Skin Responses
Hives are a rare side effect of red light therapy. While RLT is generally safe, some individuals can experience skin reactions, including hive-like symptoms. These reactions are typically mild and temporary, resolving on their own.
One potential factor for hive-like reactions is heat-induced urticaria. RLT devices generate minimal heat, but this slight warmth can trigger a heat-related skin response in sensitive individuals. Heat hives occur when the body’s temperature rises, leading to histamine release and welts.
Photosensitivity can also play a role, though RLT uses non-UV wavelengths. A pre-existing photosensitivity could be exacerbated, potentially leading to a reaction. Certain medications can increase photosensitivity.
Allergic reactions might not be to the light itself, but to components of the device or products used with it. Materials like plastics or metals in the device casing can cause mild skin irritation. Conductive gels, cleaning agents, or skincare products applied before or after RLT sessions may also contain allergens that could trigger a reaction.
Overuse or improper application of red light therapy can also lead to skin irritation. Excessive duration or intensity can result in redness, itching, or, in rare cases, hive-like symptoms. Following manufacturer instructions regarding treatment time and distance is important to minimize these risks.
RLT might unmask or exacerbate pre-existing skin sensitivities or conditions. Individuals with skin disorders involving photosensitivity may experience temporary flare-ups. Starting with shorter sessions and monitoring the skin’s response is advisable.
It is important to differentiate hives from common, mild, and temporary RLT side effects. Transient redness, warmth, or mild dryness and tightness are frequently reported and usually benign, resolving quickly after a session. These minor effects are distinct from persistent, itchy welts.
Managing Unwanted Skin Reactions
If hives or any persistent skin reaction appears after red light therapy, stop using the device immediately. For mild reactions, applying cool compresses can help soothe the skin and reduce itching and inflammation.
Using gentle, hypoallergenic moisturizers can help calm the irritated area. Avoid harsh soaps or irritants on the affected skin. Do not scratch the affected area to prevent further irritation or potential infection.
Seek professional medical advice if hives are persistent, widespread, painful, or accompanied by other symptoms. Medical attention is needed if symptoms include swelling of the face, lips, or throat, difficulty breathing, or a sudden drop in blood pressure, as these indicate a severe allergic reaction requiring emergency care. A doctor can provide a proper diagnosis.
If the rash blisters, becomes infected, or does not improve within a short period, consult a healthcare professional. They can offer guidance and may suggest allergy patch testing if device components or products are suspected as the cause of the reaction.