This is especially evident in the case of dust particles. It is also possible for larger objects to lodge in the eye. The most common cause of intraocular foreign bodies is hammering. Corneal foreign bodies are often encountered due to occupational exposure and can be prevented by instituting safety eye-wear at work place.Foreign bodies in the eye affect about 2 per 1,000 people per year. Skin
Splinters are common foreign bodies in skin. Staphylococcus aureus infection often causes boils to form around them.Tetanus prophylaxis may be appropriate. Peritoneum
Foreign bodies in the peritoneum can include retained surgical instruments after abdominal surgery. Rarely, an intrauterine device can perforate the uterine wall and enter the peritoneum. Foreign bodies in the peritoneum eventually become contained in a foreign body granuloma. In the extremely rare case of retained ectopic pregnancy, this forms a lithopedion. Other
Foreign bodies can also become lodged in other locations:

anus or rectum
blood vessels or thoracic system
ears
nose
teeth and periodontium
urethra
vagina

Other animals
Foreign bodies are common in animals, especially young dogs and cats. Dogs will readily eat toys, bones, and any object that either has food on it or retains the odor of food. Unlike humans, dogs are susceptible to gastrointestinal obstruction due to their ability to swallow relatively large objects and pass them through the esophagus. Foreign bodies most commonly become lodged in the stomach because of the inability to pass through the pyloric sphincter into the jejunum. Symptoms of gastrointestinal obstruction include vomiting, abdominal pain often characterized by aggression, acute infection, and depression due to dehydration.
Potts puffy tumor, first described by Sir Percivall Pott in 1760, is a rare clinical entity characterized by subperiosteal abscess associated with osteomyelitis. It is characterized by an osteomyelitis of the frontal bone, either direct or through haematogenic spread. This results in a swelling on the forehead, hence the name. The infection can also spread inwards, leading to an intracranial abscess. Potts puffy tumor can be associated with cortical vein thrombosis, epidural abscess, subdural empyema, and brain abscess. The cause of vein thrombosis is explained by venous drainage of the frontal sinus, which occurs through diploic veins, which communicate with the dural venous plexus; septic thrombi can potentially evolve from foci within the frontal sinus and propagate through this venous system. This type of chronic osteomyelitis of the frontal bone is confused with acute sub-periosteal abscess of the frontal bone, which presents as a discrete collection over the frontal sinus. Although it can affect all ages, it is mostly found among teenagers and adolescents. It is usually seen as a complication of frontal sinusitis or trauma. Medical imaging can be of use in the diagnosis and evaluation of the underlying cause and extent of the condition. Ultrasound is able to identify frontal bone osteomyelitis, while computed tomography (CT) can evaluate bony erosion, and along with magnetic resonance imaging (MRI), can better appreciate the underlying cause and extent of possible intra-cranial extension/involvement. Cause
Frontal sinusitis, acute or chronic. Frontal trauma, usually blunt. Some cases have been seen in a context of intranasal substance abuse (cocaine, methamphetamine).