Research indicates that alopecia areata is related to autoimmune processes, whereby the immune system attacks hair follicles, leading to hair loss. Genetic predispositions play a substantial role, with known triggers including emotional or physical stress, vaccinations, viral infections, and certain medications. Individuals with a history of allergies or other autoimmune disorders are at an increased risk of developing this condition.

Syphilis is a chronic sexually transmitted infection (“STI”) or sexually transmitted disease (“STD”) caused by the bacterium Treponema pallidum. It is mainly spread through sexual contact and/or exposure to infectious sores, bodily fluids, contaminated blood or mucous. But because symptoms of syphilis can sometimes resemble an allergic reaction, some individuals may mistakenly believe they have an allergy instead.

Eczema is a common skin condition that raises concerns, particularly regarding its potential exacerbation in Hong Kong's humid climate. Interestingly, moderate humidity can actually benefit the condition by reducing skin dryness, a well-known trigger for eczema. However, it is important to note that humid environments can also promote the growth of mites—microscopic insects that can bite and irritate the skin, potentially aggravating eczema symptoms. Additionally, factors such as stress, exposure to chemicals, and extreme weather conditions (both hot and cold) can influence the severity of eczema. Therefore, it is essential to consider a combination of factors rather than focusing on a single cause.

An epidermal cyst is a common skin condition that occurs more frequently in men than in women. These cysts typically develop in areas with active glands, such as the scalp, face, neck, hands, feet, and genitals.

It’s common to notice new moles appearing on our skin, particularly for those that previously did not exist. While some moles may have been present since childhood, others can develop later in life, often without a clear cause. Research indicates that prolonged exposure to ultraviolet (UV) light may be associated with an increase in mole formation, suggesting that individuals with extensive sun exposure might be at higher risk of developing new moles.

Syphilis is a sexually transmitted disease/infection (STD/STI) caused by a bacterial infection. Both men and women can contract it through sexual contact with an infected person. While syphilis is treatable in its early stages, if left untreated, it can lead to serious complications affecting various organs and systems in the body. Early diagnosis and treatment are essential to prevent these potential health issues.