20
Mar
How Long Does A Delayed Allergic Reaction Last. Chronic hives occur almost daily for more than six weeks and are typically itchy. Milder allergies may not cause noticeable symptoms for several hours. Each hive lasts less than 24 hours. Contact dermatitis can last about 2 weeks and Atopic dermatitis can last much longer up to several weeks.
Of course avoid whatever you came in contact with to cause the allergy. Although allergic reactions can be a nuisance and hamper your normal activities most are mild. Some patients have their rash for more than six days. I was in and out of the ER. It must be mentioned here that if the reaction lasts for more than a day or two and does not reduce in intensity or only worsen with time you should not wait or delay and see the doctor at once. It depends on the bodys tolerance to amoxicillin.
Who are at risk.
It can last for three to six days 3. Stings can often cause a red ring-like reaction. The redness will last up to 3 days and does not necessarily represent an infection. Contact dermatitis can last about 2 weeks and Atopic dermatitis can last much longer up to several weeks. Of course avoid whatever you came in contact with to cause the allergy. Once an allergen is in your body an allergic reaction may begin within seconds or minutes.