Positives

• LLLT or photobiomodulation comes up in fatigue, pain, and recovery-focused self-experiments, often using red or near-infrared devices at the head, neck, or chest Reddit.

Negatives

• Patients who try it usually treat it as a low-risk adjunct — short daily sessions, watching for headache, overstimulation, or a paradoxical crash — rather than expecting it to solve core symptoms Reddit.

Hurdles & Side Effects

• Vielight Neuro Gamma 4 intranasal-transcranial devices retail in the $1,500-2,500 range, and the manufacturer warns the devices should not be used by people with active brain bleeds or a history of seizures.
• Some patients experience mild headaches, dizziness, or scalp discomfort during initial sessions, and 810nm devices require eye-shielding precautions if pointed near the orbit.