A major cause for iron deficiency anaemia is the poor dietary intake. Deferioxamine, an iron-chelating agent, which has possible anti-inflammatory properties, causes haemoglobin and serum iron levels to increases. This shows that iron stores are needed within the body and an adequate dietary intake to meet the recommended intakes should be encouraged, even though there is no evidence for additional routine supplementation for patients with RA. Studies have examined the effect of calcium supplementation on bone mineral density among subjects taking corticosteroids. A study of calcium combined with vitamin D3 in RA patients taking low-dose corticosteroids demonstrated a reduction in bone mineral density loss in both the spine and trochanter, but not the femoral neck. However, no change was seen in BMD with calcium and vitamin D3 supplementation in RA patients not receiving corticosteroids. Therefore, there is little evidence to support calcium and vitamin D supplementation in corticosteroid receiving RA patients. Lastly, low levels of serum zinc have been reported in patients with RA which may be caused by elevated IL-1b levels. However, Zinc supplementations yield contradictory results and at present do not support a therapeutic use of zinc. Food containing high source of fluoride to help treat Rheumatoid Arthritis include tomatoes, oranges, bell peppers and grapefruit, which you should eat in moderation. Iron can be incorporated into the diet by eating seafood, spinach, and peas. Moderate amounts of calcium should be included into the diet by having milk, cheese, dairy products, curly kale, okra, bread and fortified flour products such as cereals.
Erythema ab igne (EAI), also known as hot water bottle rash, is a skin condition caused by long-term exposure to heat (infrared radiation). Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema, hyperpigmentation, scaling, and telangiectasias in the affected area. Some people may complain of mild itchiness and a burning sensation, but often, unless a change in pigmentation is seen, it can go unnoticed. Causes
Different types of heat sources can cause this condition such as:

Repeated application of hot water bottles, heating blankets, or heat pads to treat chronic pain—e.g., chronic back pain. Repeated exposure to heated car seats, space heaters, or fireplaces. Repeated or prolonged exposure to a heater is a common cause of this condition in elderly individuals. Occupational hazards of silversmiths and jewelers (face exposed to heat), bakers, and chefs (arms, face)
Resting a laptop computer on the thigh (laptop computer-induced erythema ab igne). In a 2012 review, Riahi and Cohen describe the characteristics of laptop computer-induced erythema ab igne. Temperatures between 43 and 47 °C can cause this skin condition; modern laptops can generate temperatures in this range. Indeed, laptops with powerful processors can reach temperatures of 50 °C and be associated with burns. Positioning the laptop on the thighs can allow for direct exposure to the heating elements of the laptop, which include the central processing unit (CPU) and the graphics processing unit (GPU). At least 15 cases have been reported by 2012 with the condition usually affecting the left anterior thigh.