Most mothers who develop mastitis  usually do so within the first few weeks after delivery. Most breast infections occur within the first or second month after delivery or at the time of weaning. However, in rare cases it affects women who are not breastfeeding. Terminology
Popular usage of the term mastitis varies by geographic region. Outside the US it is commonly used for puerperal and nonpuerperal cases, in the US the term nonpuerperal mastitis is rarely used and alternative names such as duct ectasia, subareolar abscess and plasma cell mastitis are more frequently used. Chronic cystic mastitis is an older name for fibrocystic disease. American usage: mastitis usually refers to puerperal (occurring to breastfeeding mothers) mastitis with symptoms of systemic infection. Lighter cases of puerperal mastitis are often called breast engorgement. In this article, "mastitis" is used in the original sense of the definition as inflammation of the breast with additional qualifiers where appropriate. Etymology and pronunciation
The word mastitis () uses combining forms of mast- + -itis. The word mammitis () uses combining forms of mamm- + -itis. They are synonymous in modern usage, and mastitis is the more commonly used synonym. Other animals
Mastitis occurs in other animals as in humans, and is especially a concern in livestock, since milk from the affected udders of livestock may enter the food supply and pose a health risk. It is a major condition in some species, like dairy cows. It is the cause of much unwanted suffering for the dairy cows.
Malum perforans is a long-lasting, usually painless ulcer that penetrates deep into or through the skin, usually on the sole of the foot (in which case it may be called malum perforans pedis). It is often a complication in diabetes mellitus and other conditions affecting the nerves. Presentation
These ulcers have punched-out edge and slough in floor, resembling gummatous ulcer. Surrounding area might have loss of sensation. Cause
This condition results from denervation of areas exposed to day-to-day friction of bony prominences. The denervation may be result of any of the following diseases:
Spinal injuries
Leprosy
Peripheral nerve injury
Diabetic neuropathy
Tabes dorsalis
Transverse myelitis
Meningomyelocele
Syringomyelia

Pathophysiology
Normal pressure and pain sensations are essential for protecting the foot from excessive and prolonged pressures over bony prominences. In insensitive foot, such as in diabetic neuropathy, soft tissues are exposed to excessive pressures without knowledge of the individual. In other words, by nerve damage in the feet, the patients get no feedback on the impact of the feet when walking. These ulcers start with callosity under which suppuration takes place. The pus comes out and a hole forms under which the lesion grows deeper. This leads to punched-out, painless ulcers usually under metatarsal heads, tip of toe, or proximal interphalangeal joint of a hammertoe or on the heel. In non-ambulatory patients, these ulcers are found on buttocks and back of the heel. Diagnosis
Diagnosis is clinical. Sensation is tested using graded monofilament. Treatment
The underlying cause of the neuropathy is first treated. Necrotic portions of the wound are removed and the wound is kept moist at all occasions.