Bedbug bite sores appear as raised, itchy bumps. They can occur from a few seconds to several weeks following a bite. Antihistamines and hydrocortisone may help reduce itching and irritation.

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While the bug is sucking blood, some of its secretions get mixed in. Anaphylaxis With Insect Bites: Very Rare A severe life-threatening allergic reaction is called anaphylaxis. The main symptoms are ...