Reply To: Does RLT have side effects? Home › Forums › Red Light Therapy › Does RLT have side effects? › Reply To: Does RLT have side effects? October 6, 2020 at 1:10 pm #854 MamaGeeParticipant I’m planning to buy this red light therapy but I’m curious if anyone of you had some side effects on using this? I heard that you may have some skin allergies from this. is that true?