question: why do old scars hurt when the weather changes?
comment: I would venture to guess that it’s because scar tissue is much different than regular skin tissue in that it is essentially just connective tissue and does not have various layers. That area no longer has the insulation that normal skin layers would provide so the nerves there are slightly more exposed to the elements, especially if you say they’re deep scars
passages: Individuals suffering autoimmune disorders such as systemic lupus erythematosus may have an increased incidence of developing SCARs. While the cause for this possible predilection has not been determined, the altered immune system and the excessive production of cytokines occurring in these disorders could be contributing factors.
  
  Section::::Pathophysiology.:Effectors of tissue injury.
   The first publication of documented changes in pain perception associated with the weather was in the "American Journal of the Medical Sciences" in 1887. This case report described a person with phantom limb pain who concluded that "approaching storms, dropping barometric pressure and rain were associated with increased pain complaint." Most investigations examining the relationship between weather and pain have studied people diagnosed with arthritis. After reviewing many case reports, Rentshler reported in the "Journal of the American Medical Association" in 1929 that there was strong evidence that "warm weather is beneficial and barometric pressure changes are detrimental to patients with arthritis."
   Section::::Late 19th century.:Critical response.:Hazards.
   Section::::Scar free healing in nature.
   Normal furrowed bark has a layer of bark over the wood below, however bark may peel or fall off the tree in sheets (river birch), plates (sycamore and pine), strips (cedar) or blocks (dogwood).
  
  Section::::Causes.
   Skin scars occur when the dermis (the deep, thick layer of skin) is damaged. Most skin scars are flat and leave a trace of the original injury that caused them. 
  
  Wounds allowed to heal secondarily tend to scar worse than wounds from primary closure.
  
  Section::::Pathophysiology.:Collagen synthesis.
   Section::::Reliability.:Sayings which may be locally accurate.:Aches and pains.
  
  There have been medical studies done which indicate some people experience this effect. The most likely reason is that with a fall in atmospheric pressure, blood vessels dilate slightly in reaction. This has the effect of aggravating already-irritated nerves near corns, cavities, or arthritic joints. Studies are inconclusive, however, with some researchers attributing this effect to selective memory.
  
  Section::::Reliability.:Fallibility of lore.
   SCARs are here considered as a group focusing on the similarities and differences in their pathophysiologies, clinical presentations, instigating drugs, and recommendations for drug avoidance. Further details on these syndromes can be found on their individual Wikipedia pages.
  
  Section::::Types.
  
  Section::::Types.:SJS, TEN, and SJS/TEN.
   BULLET::::- Keloids: Keloids are raised scars. Keloiding can be a result of genetics, skin colour (darker skin types are more prone to keloiding), or irritation. Keloids are often sought for a visual, 3-D effect and for tactile effects. If an enclosed area perimeter is cut or branded, the skin inside the closed space may die off and scar due to a lack of blood flow.
  
  BULLET::::- Touch-ups: If a scarification does not heal to yield a prescribed outcome, secondary scarifications may be conducted.
  
  Section::::Dangers/cautions.
   A study published in the "British Medical Journal" in 2017 examined reports of joint or back pain from millions of doctor visits between 2008 and 2012 as recorded by Medicare, the U.S. health system for the elderly. It compared these to rain data as recorded by the National Oceanic and Atmospheric Administration, but found no correlation.
  
  Section::::Non-English languages.
   July is the hottest month in Pithole, when the average high temperature is and the average low is . January is the coldest month with an average high of and an average low of . The average of precipitation a year wreaked havoc on Pithole's many unpaved streets, especially the heavily traveled First and Holmden. Portions of First Street were planked or corduroyed in response to the resulting quagmire of mud that would often trap wagons and draft animals.
  
  Section::::History.
   The years 1763 and 1887 brought great earthquakes to Pambujan and made remarkable imprints by leaving huge cracks on its ground which until now can be found 2 kilometers south-west from the town’s center.
   In the autumn of 1967, already marked by heavy rains, the cracks in the ground expanded. During the winter of 1967-1968, the successions of freeze-thaw lubricated the sliding surfaces. The rainy spring only aggravated the instability of the land. During the autumn 1968 rains, more than a year after the start of the sequence, a flow was triggered resulting in a blackish marl-limestone detrital mass and marl-shale colluvium. 
  
  Section::::Geography.:Toponymy.
   The son later put on his clothes and with a friend dialed 911, afraid to return home. A relative took the child to the hospital and Malone was arrested. The relative told news reporters that some of the welts didn't subside until a month later. A few welts healed only after months passed and a report in the Cincinnati Enquirer stated one welt on his buttock disappeared only in December, more than six months later.
   Risk factors for developing shin splints include:
  
  BULLET::::- Flat feet or rigid arches
  
  BULLET::::- Being overweight
  
  BULLET::::- Excessively tight calf muscles (which can cause excessive pronation)
  
  BULLET::::- Engaging the medial shin muscle in excessive amounts of eccentric muscle activity
  
  BULLET::::- Undertaking high-impact exercises on hard, noncompliant surfaces (ex: running on asphalt or concrete)
  
  People who have previously had shin splints are more likely to have it again.
  
  Section::::Pathophysiology.
   Other potential causes include stress fractures, compartment syndrome, nerve entrapment, and popliteal artery entrapment syndrome. If the cause is unclear medical imaging such as a bone scan or MRI may be performed. Bone scans and MRI can differentiate between stress fractures and shin splints.
  
  Section::::Treatment.
   Tissue loss and autoamputation are potential consequences of frostbite. Permanent nerve damage including loss of feeling can occur. It can take several weeks to know what parts of the tissue will survive. Time of exposure to cold is more predictive of lasting injury than temperature the individual was exposed to. The classification system of grades, based on the tissue response to initial rewarming and other factors is designed to predict degree of longterm recovery.
  
  Section::::Prognosis.:Grades.
  
  Grade 1: if there is no initial lesion on the area, no amputation or lasting effects are expected
   High melanin levels and either African or Asian ancestry may make adverse scarring more noticeable.
  
  Section::::Types.:Hypertrophic.
  
  Hypertrophic scars occur when the body overproduces collagen, which causes the scar to be raised above the surrounding skin. Hypertrophic scars take the form of a red raised lump on the skin. They usually occur within 4 to 8 weeks following wound infection or wound closure with excess tension and/or other traumatic skin injuries.
  
  Section::::Types.:Keloid.
  
  Keloid scars are a more serious form of excessive scarring, because they can grow indefinitely into large, tumorous (although benign) neoplasms.
   Stretch marks (technically called "striae") are also a form of scarring. These are caused when the skin is stretched rapidly (for instance during pregnancy, significant weight gain, or adolescent growth spurts), or when skin is put under tension during the healing process, (usually near joints). This type of scar usually improves in appearance after a few years.
  
  Elevated corticosteroid levels are implicated in striae development.
  
  Section::::Types.:Umbilical.
   The perceived relationship between changes in weather and pain has been recorded since the classical Roman age. Hippocrates was the first to note, in about 400 B.C., that many illnesses were related to changes in season. The large body of folklore about how weather affects pain is reflected by traditional sayings and expressions, such as "aches and pain, coming rains," "feeling under the weather," and "ill health due to evil winds."
   About 25% of patients have cutaneous lesions, with tense vesicles or bullae, mainly on the face, neck, and scalp. Healing of erosion is either with or without atrophic scars. Cutaneous lesions of cicatricial pemphigoid presents in 2 subtypes: (1)presents as generalized eruption of tense bullae without scarring (2) presents as localised blisters on an erythematous base, resulting in atrophic scarring.
  
  Section::::Clinical Features.:Cicatricial pemphigoid is also associated with malignancy..
   Section::::Types.:Atrophic.
  
  An atrophic scar takes the form of a sunken recess in the skin, which has a pitted appearance. These are caused when underlying structures supporting the skin, such as fat or muscle, are lost. This type of scarring is often associated with acne, chickenpox, other diseases (especially "Staphylococcus" infection), surgery, certain insect and spider bites, or accidents. It can also be caused by a genetic connective tissue disorder, such as Ehlers–Danlos syndrome.
  
  Section::::Types.:Stretch marks.
   Dr. George D. Winter (1927-1981) was the British-born pioneer of moist wound healing. In 1962, while working at the Department of Biomechanics and Surgical Materials at the University of London, Winter published his landmark Nature paper "Formation of the scab and the rate of epithelisation of superficial wounds in the skin of the young domestic pig" (Nature 193:293 1962) where he demonstrated that, contrary to the conventional wisdom that wounds should be allowed to dry out and form scabs to promote healing, wounds instead healed faster if kept moist. Winter formed multiple partial thickness wounds on the backs of pigs, half left open to the air and half covered with a polymer film to keep them hydrated. The latter wounds healed faster, as measured by the migration of new epithelium on the wound bed. This work began the evolution of modern wound dressings that promote moist wound healing.
   Section::::From wind.
   Section::::Symptoms.
  
  Splints usually cause mild lameness (a grade of 1–2 out of 5). The injured area is hot, painful, and inflamed with a small bony swelling. However, splints do not always cause lameness, especially once "cold". More severe lameness is sometimes associated with a fractured splint bone, or soft tissue injury adjacent to the splints.
  