Symptomsn from flea and tick collars?

Answer 1

In order to check or want to know if your pet has fleas, parting it's hair, look for small bits of brown dust itself attached to the fur. The fleas get excrete digested blood. See if the dust dissolves into a red liquid upon contact with a wet paper towel. Flea scratching and biting may leave red irritated skin, and even bald patches in some cases. Small and fast moving brown species are nothing but fleas.

Rash, papular, papules itch, a localized rash, skin rash are the general and most common symptoms of fleas.

Other symptoms may be severe itching, hives, swelling only around a lesion.