Weleda Insect Bite Spray 20ml Weleda Insect Bite Spray 20ml Treat insect bites and stings with Weleda's Insect Bites Spray. This traditionally used medicine reduces irritation and swelling after insect bites. Enriched with Arnica montana, a topical pain relief agent, to relieve pain and heal wounds. Arnica montana also delivers antiseptic and anti-inflammatory properties. Keep this handy spray in your first aid kit to ensure you're prepared for an insect-bite emergency. This spray quickly calms irritation, redness, swelling and pain. Ingredients 100ml contains ethanolic extracts of Urtica urens Herba (1=2) 95ml, Arnica montana Planta tota (1=2) 5ml. Nominal ethanol content 36% v/v.