Prevention of bedbug bites, should first improve personal hygiene and environmental sanitation, apply insect repellent drugs in advance, such as anthrone, cool oil, etc.. You can also apply 20% camphor oil or camphor tincture on the body, which can be used to repel bedbugs. For bedbug bites can be applied to a variety of anti-itch drops, such as 1% phenol or mint stovepipe lotion, 5% camphor spirit, cool oil, etc.. If the rash is extensive or the reaction is severe, you can apply topical corticosteroid preparations, such as Denide cream or Elocon cream 1-2 times a day. Oral antihistamines, such as levocetirizine or loratadine, 1 capsule 1 time a day orally.