Epidermoid cysts, commonly called sebaceous cysts, are bumps that develop beneath the surface of the skin, particularly the skin of the face, neck and trunk. Sebaceous cysts typically aren't dangerous, although large cysts, especially on the face, may affect appearance or interfere with daily life.

A pulled abdominal muscle is a relatively common, troublesome injury among physically active people. The injury muscle fiber tearing in one or more of the muscles of the abdominal wall. Also known as an abdominal muscle strain, this type of injury ranges from mild to severe, depending on the extent of tearing.

Irritable bowel syndrome, also referred to as IBS, causes your intestines to contract slower or faster than normal. Due to the difference in the way your bowels constrict, this can cause your large intestine to create gas, pain, cramping and sudden bouts of diarrhea or constipation.

"Yoga Journal" reports that shoulder injuries are common among practicing yogis. If shoulders are already weak and susceptible to injury, yoga postures need to be done with caution and care. Yoga poses should build strength in the shoulders without aggravating the injuries.

Muscle pain can stop you in your tracks. But is it a cramp or a pulled muscle that's bothering you? Though the terms are often used interchangeably, they are not the same thing.

Bone loss in the jaw bone can cause the teeth to become loosened or even fall out. Bone loss around the teeth is usually caused by periodontal disease. One of the difficulties in treating bone loss around the teeth is that the bone loss cannot be reversed, although new bone can be grafted in.

The combination of fever and back pain can be worrisome for a patient, since it is one of the patterns doctors look for when ruling out dangerous disorders such as cancer or infection.

A bone bruise results from intensive and compressive forces directed at a bone during an injury. Damage to the bone occurs in the interior, or medullary, portion and will often be accompanied by edema and swelling.

The spinal column is made of bones called vertebrae, soft cushioning discs that act as shock absorbers and strong, heavy ligaments that add form and stability. Attached to the spine are many muscles that give strength and movement to the spine.

Leg cramps from running are typically caused by overuse, muscle strain or dehydration. Running too far too quickly and without sufficient training or warming up can quickly lead to thigh and calf cramps.

Athletic teens, the elderly and people with osteoporosis are all at increased risk for pelvic fractures, which often occur as a result of a fall, motor vehicle accident or other impact force.

Bone bruising was a phenomenon that was not observed prior to magnetic resonance imaging, according to the International Society of Arthroscopy, Knee Surgery & Orthopaedic Sports Medicine. Bone marrow edema and bone bruising appear the same on MRI.