An overactive immune system, which is the source of autoimmune disease, is affected by sex hormones, according to a 2004 article by Vicki Brower in EMBO Reports. For instance, estrogen predisposes women to systemic lupus... More »

A lump in the neck can signal several medical conditions, such as enlarged lymph nodes due to a bacterial or viral infection, acne, autoimmune disease, thyroid disorder, tonsillitis, sebaceous cysts, allergies or cancer,... More » Health Pain & Symptoms

The evaluation of an isolated, swollen cervical lymph node consists of examining its characteristics, the patient’s risk factors and the presence of other clinical symptoms, according to K. M. Green Lerberg et al. in a 2... More »

MedlinePlus offers information at its website, including a short article about its purpose and links to other information resources including articles about the website, FAQs, use statistics and policies. The website als... More »

Ears turning red sporadically can be caused by a rare condition known as red ear syndrome, according to a 2013 article in The Journal of Headache and Pain. The condition can also occur naturally depending on a variety of... More » Health Pain & Symptoms

Online medical information symptom checkers are best used as a rough guide and not a definitive source of diagnoses, as Cutler PR warns. This is because these checkers do not incorporate certain essential factors, such a... More » Health Pain & Symptoms

A large nerve, called the ulnar nerve, passes through the elbow and is the source of the strange pain a person feels when he hits his elbow, explains Mental Floss. The ulnar nerve is also referred to as the funny bone. More » Health Pain & Symptoms