NO CHEMICALS: The application of Mosquito Bite Healer works only through heat, no chemicals, accelerates the healing of mosquito bites and stings, relieves itching and swelling, safer, more reliable and non-allergenic. ELECTRIC STING HEALER: The Sting Healer has a built-in rechargeable 200mHA lithium battery, powered by a USB charging cable. After charging for 30 minutes, the electric mosquito bite healer can be operated up to 100 times - more environmentally friendly. TREATS ITCHES: After being bitten by mosquitoes, applying the Bite Healer locally helps prevent itching and swelling, thus speeding up healing. Targeted hot compresses on the affected area can relieve itching and swelling and improve symptoms. COMFORTABLE HEALING PROCESS: The Mosquito Bite Heat Therapy Device uses thermal frequency pulse technology with linear motor vibration massage to improve local blood circulation and relieve itching. If the heat is uncomfortable, please remove the mosquito bite treatment device from the affected area immediately.