Having side effects from red light therapy is very unusual and then it is always about excessive treatment time. Anyone who uses a panel many times over the recommended time may lose some of the health effects. In addition, you may feel a little dizzy and generally unwell for a while after the excessive treatment, much like when you are exposed to too intense sunlight. However, the problems are temporary.
Dele:
What should you wear when doing light therapy?
Can you use light therapy when you are pregnant?