Leg rash and cycling pants

[Kat1015]

I'm having an ongoing problem with leg rash associated with cycling shorts.  The rash occurs on the front of my thighs, both above and below the leg bands.  I always wear sunscreen, and have recently tried Slide, purchased from our bike shop (it does not help).  The rash is bright red, blotchy, and does not itch, but feels like a sunburn.  Some of the areas are slightly raised, but no pustules form.  The rash is bright red the day after riding, then gradually fades over the next 4-7 days.   My family practitioner and dermatologist have looked at the rash soon after it appears, and have no idea what could be causing it.  I am not taking any medications that cause photosensitivity, and the rash does not occur on other parts of my body, or at any other time.  This problem first occurred when I was living in the upper midwest, and occurs now that I'm living in Florida.  
Any thoughts/ideas would be greatly appreciated!


This discussion is related to Rash Appeared on Legs.

[Dr Santos]

Hi,

Contact dermatitis or Irritant dermatitis results  from exposure to allergensor irritants. Phototoxic dermatitis occurs when the allergen or irritant is activated by sunlight.  Only the superficial regions of the skin are affected in contact dermatitis. Contact dermatitis takes days to fade away and when skin no longer comes in contact with the allergen or irritant.
Allergic dermatitis is usually confined to the area where the trigger actually touched the skin, whereas irritant dermatitis may be more widespread on the skin. Symptoms of both forms may include red rash, blisters or wheals. Try to avoid scratching, as this can cause secondary infections. If it persists and other symptoms arise, have this evaluated further for proper management.  Medical treatment usually consists of lotions, creams, or oral medications. This link may be helpful: http://en.wikipedia.org/wiki/Contact_dermatitis

Take care and keep us posted.