Food allergies are usually manifested from childhood. Food allergies are based on intolerance to a particular product. Symptoms are manifested both from the gastrointestinal tract (nausea, vomiting, diarrhea, bloating) and from the skin: redness and swelling of the skin, urticaria (hives). Some more severe manifestations of food allergies that are hereditary include atopic dermatitis, eczema and bronchial asthma.
Allergic reaction to bites and stings by mosquitoes, midges, wasps, bees, ants is a pathological immune reaction to the venom released by insects.
Pollen Allergy occurs during the flowering period of various plants (trees, herbs, flowers) and is seasonal.
The clinical manifestation of pollen allergy is the appearance of pollinosis or as it is also called "hay fever". Typical symptoms include: itching in the nose, throat, ears; sneezing, copious discharge of mucus from the nose, lacrimation and redness of eyes; may be followed with dry paroxysmal cough or fever.