How can you tell a crab from a flea?

The self-diagnosis of crabs can be judged from the following symptoms: (1) Itching is the main symptom, but the degree of itching varies from person to person. Itching is because crabs poke holes or pierce holes in the skin with their claws. Itching only happens when lice bite and inject saliva. Crabs will inject saliva when sucking blood, because saliva can prevent blood coagulation and is beneficial to sucking blood. Crabs suck blood several times a day, so itching is paroxysmal. (2) The rash mostly has micropores (invisible to the naked eye) at the crab bite, local redness, little red dot and blood scab on it; After about 5 days at the micropore, allergic reaction appeared locally, and papules often appeared at the bulge. Infections often occur due to scratching, such as pustules, exudation and scabbing. (3) Blue-gray spots, 0.2 ~ 2 cm in size, can be seen near the affected area, which are painless and can last for several months. This blue-gray spot can also be seen in the chest, abdomen, inner thigh and other places. The cause of this blue-gray spot is not clear, which may be related to the saliva entering the blood when the crab bites. If you have these symptoms, it is a crab. If it is really impossible to judge, you can go to a regular hospital for examination. If you have crabs, you must be treated professionally. As soon as lice are swept away, pure Chinese medicine extract and high permeability formula are used to kill crabs quickly and prevent recurrence.

I hope this answer is helpful to you.