People who have had scabies in the past may develop symptoms a few days after being exposed to scabies mites, but those who have not had scabies may be asymptomatic for up to 6 weeks. However, it is possible to transmit scabies mites to others even after infection without obvious symptoms.
Scabies mainly manifests as pimples, or small vesicles on the top of pimples and severe itching (especially at night), and the rash may spread all over the body or be limited to certain parts, such as wrists, elbows, genitals, etc. Fine, raised, grayish-white or light-black lines may also appear on the skin.
Typical symptoms
Scabies parasitic site
Adult scabies mostly move around the crevices of fingers and their sides, wrists, elbow fossa, armpits, around the navel, lower abdomen, genitals, groin, inner upper thigh, buttocks, breast folds, etc. The crevices of fingers are the most important. The face is generally not involved.
In addition to the above-mentioned parts, infants and young children often have scabies activities on the palms, soles and toes, and can invade the head and face.
Typical skin lesions and symptoms
Skin lesions manifest as pinhead-sized papules, vesicles, and blisters, often scattered and symmetrically distributed. The papules are light red or normal skin color, and the surrounding skin is red; papules herpes are small blisters appearing on the top of papules. Tunnels dug by scabies mites can often be seen at the crevices of the fingers, manifested as off-white or light black lines, curved and slightly raised, which is a unique symptom of scabies.
Patients often have severe itching on the skin, especially at night. This may be caused by stimulation of skin nerve endings when females dig tunnels in the skin, and scabies are more active at night.
If the skin lesions do not heal for a long time, secondary changes often occur, such as scratches, blood scabs, punctate pigmentation, and eczema-like changes
Other manifestations
In highly sensitive persons, skin lesions may appear widely and have bullae. Some male patients may have nodules on the scrotum and penis, light red or reddish brown, the size of mung beans to soybeans, usually accompanied by severe itching, called scabies nodules.
There is a special type of scabies called "Norwegian scabies", which is a severe form of scabies, also known as "keratotic scabies" or "crusted scabies", which mostly occurs in debilitated or immunocompromised patients, such as AIDS patients or chronic leukemia patients. The disease is characterized by extensive rash, dry skin, scabs, severe infection, especially a large number of psoriasis-like scales on the fingers (toes), swelling between the fingers, thickened, bent and deformed nails, dry and shedding hair, and local lymph node enlargement. Has a special odor.
0 Comments