"Excessive itchiness" means having a strong and constant desire to scratch or itch your skin, more than what is considered normal or usual. Full definition
Flea saliva causes excessive itchiness in pets. (vetinfo.com)
On rare occasions, side effects have included excessive itchiness or mild vomiting, but these sensitivities are few and far between. (dogsnaturallymagazine.com)
While not effective in every situation, antihistamines can help to reduce skin irritation and inflammation that leads to excessive itchiness in dogs. (vetinfo.com)