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Sun Exposure

Although sunbathing may be enjoyable and a suntan a status symbol, it must be remembered that sun exposure is a health hazard due to the effect of ultraviolet (UV) radiation on the skin and the increasing incidence of melanoma. UVB causes sunburn which can range from intense erythema to blistering and burnt skin similar to a burn from hot water or fire. Sunburn is more likely when, in addition to direct exposure from the sun, UV is also reflected from water (swimming pools or the sea), white sand or snow. The risk is greater at higher altitudes when there is less protection from the earth's atmosphere. Both ultraviolet A (UVA) and ultraviolet B (UVB) radiation are known to cause premature cancers. Drying of skin can result in exacerbation of facial seborrhoeic dermatitis. back to top

Especially Vulnerable Groups

  • Babies and children.
  • Fair skinned people who often also have red hair or blue eyes (Celtic origin).
  • Those with certain medical conditions such as albinism or previous skin cancer.
  • Those on medications such as tetracyclines including doxycycline, oral hypoglycaemic drugs and diuretics.

Precautions

  • Avoid sunburn as this is not only painful but can double the risk of skin cancer.
  • Babies should be kept out of direct sunlight.
  • Children should wear long sleeved, loose fitting shirts, hats and high factor sunscreen.
  • The greatest risk is from the midday sun, usually from 11am to 3pm when exposure should be avoided; seek shade, have a siesta.
  • Adults should wear a broad brimmed hat, long sleeved shirts and good quality sunglasses (preferably wrap around).

Sunscreens

  • Sunscreens do not replace the precautions described above but they can help absorb UVB and to a lesser extent UVA.
  • Waterproof sunscreens can prevent their removal by sweat or water although they should always be reapplied after swimming.
  • There is a voluntary star system for sunscreens grading UVA protection; more stars indicating greater protection.
  • The Sun Protection Factor (SPF) refers to the protection against UVB (e.g. SPF 8 allows approximately 8 times longer sun exposure without burning than with no protection).
  • To gain effective protection use a broad spectrum cream which protects against both UVA and UVB radiation. An SPF value of 15 or above should be used.
  • Apply sunscreen ligerally at least every 2 hours.
  • Sunscreens are expensive, be wary of cheap sunscreens bought abroad which may not give adequate protection.
  • Check expiry dates, most will last around 12-18 months after opening.
  • Apply insect repellent after sunscreen if needed.
     
     
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