 [ Symptoms ] my bf had inguinal hernia surgery 4 months ago since then he is not able to have an erection is this normal [ Disease ] the exact cause of eczema is unknown but it is thought to be linked to an overactive response by the body is immune system to unknown triggers in addition eczema is commonly found in families with a history of other allergies or asthma some people may suffer flare ups of the itchy rash in response to certain substances or conditions for some coming into contact with rough or coarse materials may cause the skin to become itchy for others feeling too hot or too cold exposure to certain household products like soap or detergent or coming into contact with animal dander may cause an outbreak upper respiratory infections or colds may also be triggers stress may cause the condition to worsen the condition is not contagious and can not be spread from person to person