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 26, 2020 at 2:31 pm #1071 niconico88Participant @leydicarol001 – Blue therapy is using wavelength range to eliminate bacteria acnes on our skin and to control the condition before an outbreak occurs. Also, it can treat conditions like skin cancer, mood disorders and sleep disorders.