Duration of the existing rash

The duration of a skin rash on the forearm can vary greatly. Skin rashes from viral diseases, such as measles, rubella or rubella rubella, usually disappear after a few days. In most cases, after a maximum of 14 days, nothing more of the rashes can be seen.

However, the situation is different with diseases such as neurodermatitis or psoriasis. These show a mostly relapsing-like course. The skin rash comes and goes, usually for a lifetime.

A parasitic infestation with scabies mites or a fungal disease does not disappear until it has been treated, so that a duration of several weeks is possible. Allergic reactions are also often transient after a few days, unless the allergenic substance is constantly supplied. Then the rash may last longer.

There are some diseases that cause a rash with blisters. These include chickenpox caused by a herpes virus. This disease leads to the formation of itchy blisters that spread from the trunk to the entire body and mucous membranes.

The blisters burst and become encrusted. There are always simultaneously burst and new still closed vesicles. Another disease that leads to a rash with blisters on the forearms is shingles. It is also caused by this herpes virus and shows a segmental infestation. Typical symptoms are severe pain in the area of the rash, as well as fever and general fatigue.

Itchy skin rash on the forearm

Itching is not only a common but also a distressing symptom of many skin rashes. Skin rashes on the lower arm can also be accompanied by itching. Possible causes of a rash on the forearm that itches are the rashes of measles, rubella or chickenpox.

These infectious diseases are also accompanied by symptoms such as fever, general fatigue and aching limbs. Furthermore, allergic skin rashes often lead to itching. Scabbing of the forearm is also accompanied by severe itching.Neurodermatitis and psoriasis also cause itching.

Skin rash without itching

Although itching is a common symptom that occurs in rashes on the forearm, there are also some conditions that do not itch. These include rubella or the rash of scarlet fever. Syphilis is also not expected to cause itching.

Although allergic skin rashes often itch, itching does not necessarily have to be present. It can also be very mild or not occur at all. The same applies to neurodermatitis or psoriasis. Itching is not present in every affected person.