Yes, it is normal. Most eyeglass nose pads are made from soft silicone. Soft silicone is a good material for eyeglass nose pads because they are translucent (clear) and stick to the skin without discomfort. Soft silicone nose pads are often advertised as being "hypoallergenic," which means they have a low incidence of causing allergic reactions. However, people with sensitive skin or silicone/latex allergies may exhibit symptoms of silicone allergy when wearing silicone eyeglass nose pads. If your skin is irritated, consult your eye doctor.
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Maybe you wear eyeglasses for a very long time. These days I am allergic to the nose pads of my eyeglasses. There is a red spot on the left side of my nose. Sometimes it's itchy but I think it's normal. Several days get passed and the symptom will fall away.
Well, yes, there are many people who suffer from nose pads of eye glasses. Generally speaking, eyeglass nose pads are small, usually oval-shaped pieces of material that protect your nose from the frame of your glasses. And in common, eyeglass nose pads can be made of four materials, such as soft silicone, ceramic, titanium and acetate. And because of these different materials, some people will be allergic to them. At that time, your eyes may get red, itchy in some degree. So to avoid it, you can use a soft, worn toothbrush or another small brush with soft bristles and warm water. And just clean it carefully.
My friends also get allergic at the nose pads of his eyeglasses because his skin is allergic to the material of the nose pad. It is normal. You could choose to change the material of the nose pad. Maybe another type will be suitable for you. You should not often eat the seafood which may also make your eyes get allergic. You should protect the eyes carefully.