Treato found 16 discussions about Cold Symptoms and Cats Allergy on the web.
Best Answer: When the toilet is flushed, the toilet is robbing pressure from the shower, which is usually close to the toilet. As the COLD water pressure goes down from the toilet flush, the HOT water pressure is higher, therefore the water gets hotter as the COLD pressure goes down.
A hot shower usually leads to excessive drying of the skin. This is one of the major causes of itchy skin after a hot shower. Hard water can leave a fine layer of soap film on your skin which can then trigger the itching sensation. Hard water contains calcium which can make your skin dry and itchy.