Doctor insights on:
Why Do Spider Bites Itch
See below: All bug bites can cause local reactions with redness, swelling and warmth without pain and itch like mosquitos. This occurs due to histamine release due to the saliva of the mosquito/bug, but there are other venoms in the bites that can have an effect too. And this can occur immediately or even hours after the bite. ...Read more
Bug bites: Any allergic reaction to a bug bite can itch however, spider bites, and deer fly are less likely to cause an allergic reaction than fire ants, mosquitos, or chiggers. Some 'bites' are not really bites at all, but rather the discomfort comes from a sting such as: fire ants, bees wasps and scorpions. ...Read more
Mosquito bite: The itching is actually a response of the immune system to antigens that are present in the mosquitoes saliva. Mosquito injects a bit of its saliva, which acts as a 'local anesthesia' so we won't know for a few seconds that we have been bitten. It also acts as an anticoagulant, preventing the blood from clotting so the mosquito can be free to draw blood for as long as it pleases. ...Read more
Chiggers: Chigger's bites often have a small red in the center of a welt & occur in areas where skin is tender like the crotch, armpits, beltline, backs of knees or ankles. They are extremely itchy. I don't think that they always create a welt - i had chiggers dozens of times in the blue ridge mountains & i don't remember having blisters. However blisters are reportedly the norm. ...Read more
Variable: Spider bites can have variable appearances. It might cause a pink or red bump with no symptoms. Or it could itch or be painful. Venomous spiders may cause significant pain radiating far from the site, cramping, sweating, necrosis of tissue or worse if there is an allergic reaction. Seek medical care asap if you think a spider bit you ; you have severe pain (can be felt at bite site ; possibly >. ...Read more
That is the reported: Norm. However, i never blistered when i got them. Chigger's bites often have a small red in the center of a welt & occur in areas where skin is tender like the crotch, armpits, beltline, backs of knees, ankles. They are extremely itchy. ...Read more
A few days usually: Occasionally, people will have a delayed-type hypersensitivity reaction to mosquito bites. I am one of those people. The initial redness (relatively mild) lasts a day or two, followed by persistent redness and itching that goes on for a week or more. Hydrocortisone cream is your friend under these circumstances. ...Read more
Mosquito bites: Store aloe vera gel in refrigerator ; apply to affected area. Rub basil leaf on bite. It repels mosquitoes ; has anti-inflammatory properties. You can mix 2 parts baking soda w 1 part water. Stir into paste ; place it over the mosquito bite. Can use calamine lotion. If you have problems w generalized welts, swelling of tongue, lips, airway - you should get urgent medical care. ...Read moreSee 1 more doctor answer
Up to you: If you are allergic to the bites, then they will itch for weeks. If you scratch them, they will itch until you quit scratching them. They can cause hard bumps called nodules if you continue to rub or scratch. Also, are the fleas still around? Other bites can look like flea bites and last a long time, such as scabies and other mites. Hydrocortisone cream and oral Benadryl (diphenhydramine) will help the itch. ...Read more
Bed bug bites may: Have no sx's/signs except for 2 small skin puncture points. A reaction may show from an hr to several days later. It can cause itchy, pink, swollen, lesions w clear center. If hypersensite blisters may occur. A telltale sign is linear track of lesions from sequential feedings – but doesn't always occur. Bites are in areas exposed while sleeping-arms, shoulders, neck ; legs. Don't usually bruise. ...Read more
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