Insect and Spider bites often cause minor swelling , redness pain and itching. These mild reactions are common and may last from a few hours to a few days. Some people have more severe reactions to bites or stings. Problems that are more serious and need immediate medical attention include:

• A severe allergic reaction with signs and symptoms that may include shock; swelling of the lips, tongue, ears, eyelids, hands and feet; coughing wheezing, difficulty breathing or a feeling of fullness or tightness in the mouth or throat; nausea, diarrhea and stomach cramps; hives and reddening of the skin; and lightheadedness and confusion.
    
• A toxic allergic reaction is different that an allergic reaction. The venom of a few insects and spiders can cause a poisonous reaction with only one bite or sting. Symptoms vary, depending on the insect or spider, Look for uncontrollable jerking movements; drowsiness; fainting; muscle spasms; headache; fever; rapid swelling; vomiting or diarrhea. Seek medical help immediately.