Collagen itself does not produce itching when released in response to allergens. It is the immune system's response to allergens that leads to itching, not the collagen.
Allergen
Mast cells are the connective tissue cells that produce histamine in response to various stimuli, such as allergens or injury. Histamine is a key mediator of inflammation and allergic responses in the body.
Because the endometrium is an epithelial tissue. Collagen and elastic fibers are produced by Fibroblasts which are found in connective tissue not epitheliam. Does that answer your question? Or do you want a more indepth response?
An allergy is an immune system response to a foreign substance that is typically harmless to others, such as pollen, certain foods, or pet dander. This response can cause symptoms like sneezing, itching, or congestion.
An antigen is a substance that produces an immune response in the body, typically by binding to specific antibodies or activating immune cells. This immune response is essential for recognizing and eliminating foreign substances such as pathogens.
Allergen
They are released by basophils and mast cells in nearby connective tissue.
Mast cells are the connective tissue cells that produce histamine in response to various stimuli, such as allergens or injury. Histamine is a key mediator of inflammation and allergic responses in the body.
A runny nose is typically caused by the body's immune response to viruses, allergens, or irritants. When these substances enter the nasal passages, the body produces extra mucus to trap and remove them, leading to a runny nose.
Histamine is released by your body in response to allergens or irritants, leading to redness and swelling of tissues as part of the inflammatory response. This can happen in conditions like allergies, insect bites, or infections.
A runny nose is often caused by the body's immune response to irritants like viruses, bacteria, or allergens. When these irritants enter the nasal passages, the body produces more mucus to trap and remove them, leading to a runny nose.
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Allergy
The overgrowth of fibrous tissue at the site of a scar is called a keloid. Keloids occur when the body produces excessive collagen in response to the skin healing process, leading to raised and thickened scars that extend beyond the original wound boundaries. They can be itchy, painful, and cosmetically bothersome.
Allergy is a hypersensitive elicitation of immune response of body upon exposed to some allergens.
The adrenal gland (more specifically the Adrenal Medulla).
This substance has a general name called an antigen.