What causes allergic rashes?

Allergic rashes often cause skin eruptions known as drug rashes. Drug rashes typically occur shortly after drug fever; however, they may also appear before the onset of drug fever. So, what causes allergic rashes?

What Causes Allergic Rashes?

Allergic rashes occur when allergens enter the body through direct skin contact, inhalation through the nose or mouth, ingestion, or injection, triggering abnormal immune responses. The immune system is stimulated to produce antibodies, and subsequent exposure to the same allergen leads to an allergic reaction, resulting in a series of skin symptoms.

Main causes include exposure to allergens: allergens are mainly categorized into chemical, animal, and plant types, with chemical factors being the most common. Animal-derived allergens primarily refer to animal toxins and insect hairs, such as those from bees, jellyfish, and caterpillars. Plant-derived allergens come from parts of plants such as poison ivy, nettles, and psoralea, including their leaves, stems, flowers, and fruits. Food: certain foods can trigger allergic reactions in the body. Common allergenic foods include seafood, milk and dairy products, eggs, and meats.

Medications: including oral and injectable drugs. Common examples are antibiotics such as penicillin and cephalosporins; antipyretic and analgesic drugs such as aspirin, indomethacin, and ibuprofen; sedatives and antiepileptic drugs such as phenobarbital and carbamazepine. Predisposing factors include history of allergies: individuals with prior allergic reactions are more likely to experience recurrence. Family history: children whose parents have a history of allergic rashes are also at higher risk. Age: infants and young children are more susceptible to allergic rashes than adults. We hope this article has been helpful to you. Wishing you a happy life and good health!