Diagnosis

The dermatologist will first conduct a survey. In doing so, he wants to find out since when the rash on the soles of the feet has started. It is helpful if the patient can describe how it started.

In addition, it is important to distinguish in which situations, in leisure time or at work, the complaints have occurred. Known allergies should be named and if an allergy passport is available, it should be brought to the medical examination. In addition, the knowledge of the frequent occurrence of skin diseases in the family is helpful in finding a diagnosis.

Furthermore, travel infections must be taken into account, if a trip has been made before. Furthermore, it is very important to give information about medication. Medications that have been taken recently should also be listed.

Since certain drug allergies can also occur with a delay. If it concerns a child, also childhood diseases must be excluded. After taking the medical history, the doctor will have a thorough look at the rash.

The spread pattern of the skin rash on the sole of the foot can provide important clues as to its cause. He will also feel the temperature and whether there are any elevations on the skin of the sole of the foot. It is important to distinguish whether the rash is infectious or non-infectious on the sole of the foot.

For this, other signs of inflammation of the body must be examined. This means asking and testing for fatigue, general feeling of illness, swollen lymph nodes and fever. If necessary, a blood test is performed.

If athlete’s foot is suspected, the doctor can have a skin sample examined in the laboratory. If an allergy is suspected, an allergy test is performed. Elevated laboratory values of immunoglobulin E (IgE) and/or eosinophil cationic protein (ECP) may indicate an allergy.

Associated symptoms

Infection may be accompanied by fatigue, general feeling of illness, fever or swelling of the lymph nodes. In most cases, the swollen lymph nodes are located in the neck or armpit area. In addition to the rash on the sole of the foot, burning pain and itching can occur.In addition to the skin rash on the sole of the foot, there may be skin lesions on other parts of the body.

The mucous membranes may also be affected. Swelling may also occur. Scaling of the skin is also possible.

These can manifest themselves in different ways. A skin rash is usually characterized by extensive skin changes. However, these can also appear in the form of individual red dots on the sole of the foot.

They can be flat or raised. The cause can be skin irritation that has developed in the course of allergic or toxic contact dermatitis. But inflammatory processes can also trigger red spots on the sole of the foot.

It is important to check whether this skin rash occurs elsewhere in the body. In children, infectious diseases must be considered. In adults, other accompanying symptoms must be checked and the suspicion of venereal diseases must be excluded in the medical history.

A skin rash on the sole of the foot can cause mild to severe itching. Due to cellular processes in the context of allergies and inflammations, the messenger substance histamine is released. This activates nerve endings and can trigger pain or itching. The pathomechanism of itching is also frequently associated with the body’s own messenger substance interleukin 31st.