Allergic contact dermatitis is a type of skin reaction that’s triggered when the skin comes in contact with some foreign substance. Skin inflammation and hives are hallmark symptoms of allergic contact dermatitis because the body’s immune system perceives the substance as toxic or pathogenic.

Fluid-filled bumps on the skin can be alarming, but in most cases they can actually be a sign of healing. Many times the skin develops fluid-filled sacs in order to soothe and provide nutrients to skin that is burned or worn raw. These bumps tend to be painless, and most go away over time.

Facial veins, also referred to as spider veins, are broken capillaries just beneath the skin's surface. Aging, sun damage, extreme heat or cold, steroid use and inflammatory skin conditions are just a few of the factors that contribute to the appearance of these veins.

Plantar warts develop on the soles of the feet and can be difficult to treat. According to MayoClinic.com, they are very contagious, have a tendency to be painful and sometimes require a doctor’s assistance for removal.

It sounds simple and enticing: Have a doctor zap your stretch marks away and be done with them. Unfortunately, stretch marks are a problem with no easy solution. Doctors disagree about what works and what doesn't. While some physicians embrace laser treatment of stretch marks wholeheartedly, others are skeptical.

Anyone can develop excessive sweating during a workout, no matter their fitness level. Excessive sweating during exercising does not mean that you are out of shape -- in fact it can sometimes signal the contrary.

Your skin is your body's living armor. But this unsung hero often doesn't get much attention until something goes wrong -- like an unexplained bump under the skin on your arm.

Plantar warts are small, non-cancerous growths that appear on the bottom of the foot. Warts are viral, caused by the HPV virus. Some plantar warts go away on their own, while others require treatment.

Rashes that involve the skin of the face can be caused by infections, irritations or inflammatory reactions. Local reactions cause a variety of facial skin rashes; however, some facial rashes can be caused by systemic medical conditions as well.

Keratosis pilaris, a skin condition colloquially called "chicken skin," usually doesn't raise major health concerns, but it can represent an annoyance for those who suffer from it.

If you notice a rough, round bump on your finger that seemed to appear out of nowhere, you may have a wart. Warts that appear on the fingers are known as common warts and are caused by the human papillomavirus, says the Mayo Clinic. In most cases, warts on the fingers are not a serious medical condition.

If you sweat excessively during a workout, you can become dehydrated. According to MayoClinic.com, one of the symptoms of dehydration is thick, stringy saliva, which can form a white, sticky substance around your mouth. Another cause is a condition known as dry mouth.