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 »

The common symptoms of an overactive thyroid are weight loss, increased appetite, irritability, rapid heart rate and anxiety, according to the Office on Women's Health, whereas underactive thyroid symptoms include weight... More »

Endocrinology is an area of medicine that deals with the diagnosis and treatment of diseases of the endocrine system. It focuses on body processes such as metabolism, reproduction, sensory perception and respiration, and... More » Education

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