... weaken with distance, so the closer to the source of the far infrared rays your body is, the more impact they will have ... chilblains. 5) Relaxes muscles and relieves muscular ache - Reduces back, shoulder and neck pains. 6) Excellent for reducing swelling, ... the healthy tissues of patients with gastric ulcers and duodenal ulcers. 14) Eliminates tiredness, improves body functions and relieves stress in ...