There are various triggers responsible on what causes eczema. The triggers will depend also to a certain extent on the types of eczema. Basically, there are two causes of eczema. One is internal triggers and the other is external causes. When the skin comes in contact with an external trigger, reactions on the skin in the form of eczema occurs. The solution then lies in identifying these triggers that can lead to eczema and controlling them. The internal triggers manifest the reaction of the immune system to that begins at the cellular level.
Internal triggers can cause reaction in the immune system which manifest in the form of eczema. It is not really possible to determine the exact cause of this reaction but it is thought that there is possible impairment in the skin preventing it to act as a barrier probably due to poor functioning of the immune system. In some studies, it is found out that people with atopic dermatitis have defects in their genes that cause abnormalities in particular proteins that are responsible in the maintenance of the function of the skin barrier. The eczema often manifest in the weakened areas of the body such as hand or face. Allergens can trigger eczema both internally and externally. But the internal immune response can cause the manifestation of eczema in the body. Molds, pollution, dust mites, pollens, pet hair are some of the possible allergens that can cause eczema. Allergens are closely associated with atopic dermatitis. Stress combine with the other internal triggers can also cause a reaction. If you experience the symptoms of asthma and hay fever, then most likely you are prone to eczema too. Allergen causing factors can cause itchiness and red inflammation linked to eczema.
There are numerous possible external triggers that can cause eczema. Food is one of them. Strawberries, dairy, nuts, shellfish are all known to cause allergic reactions and eczema. Certain food additives can elicit the same reaction too such as food dyes, chemicals and preservatives. Children are particularly sensitive to food allergens. Since their immune system is still underdeveloped, they typically develop reactions after consuming the food product. Chemicals are other external triggers to watch out for. There are certain chemicals that patient come in contact daily. For instance, perfume, detergents, soaps, fabric softeners, cleansing solutions, lotions and cosmetics are but some of the known substances that can trigger eczema. If the patient touches these chemicals in their clothing or bedding for an extended length of time, eczema may result.
The temperature could also be a possible cause of eczema. Older people are more susceptible to cold weather for instance because their skin is thinner. During the colder months, it is not unusual for them to develop dry skin, skin inflammation and itching. Heat can also cause eczema. A heat rash often develops in skin with higher body temperature with sweating. There are other possible causes of eczema that can trigger eczema. It is important to note the family history of the patient also. Typically, the disorder is passed on to the child by the parent. Taking into consideration the different factors will help you determine what causes eczema.