Why is class IV therapy laser used in laser therapy for pain?

During a session, a trained professional moves the applicator over or near the treatment area using settings selected for the body region and clinical goal. The device may feel warm, but sensation varies. The intended effect is local, and the treatment is usually part of a broader plan that may include exercise, education, manual techniques, or activity changes. Laser therapy does not identify the cause of pain and should not delay assessment of a new or unexplained symptom.

Tell the therapist if you are pregnant, have light sensitivity, take medicines that increase sensitivity to light, or have an active skin problem over the area. Wear the eye protection provided and keep the treatment area still as instructed. Follow the exercise and loading plan after the session, and record whether pain, stiffness, or function changes. Do not increase activity sharply just because the area feels better for a short time.

Tell the therapist promptly about marked heat, burning, blistering, a new rash, or worsening pain during or after treatment. Seek urgent assessment for sudden weakness, loss of sensation, severe swelling, a rapidly spreading skin reaction, or symptoms suggesting a serious underlying problem rather than ordinary treatment soreness.

Ask what diagnosis the treatment is addressing, which tissue will be treated, how it will be combined with exercise, what sensation is expected, and how progress will be judged beyond pain alone.