Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. From your description of your rash it could be one of these possibilities: Allergy or eczema, which usually appears in such areas, especially, if you have a prior history of any allergies. It could be aggravated by contact with the synthetic/woolen fabric or any metallic object, most commonly containing nickel such as watches and jewelry. This is allergic contact dermatitis. Without treatment it may persist and aggravate each time you come in contact with certain items. Sweat/certain cosmetics/strong soaps can also make it worse. The strap of the bag may be causing a reaction rather than the weight. The bag rubbing on the rash may also aggravate it. Also, rule out similar rashes elsewhere on the body and in family members to check for fungal infections, etc. First step is to note down exactly all the causes that give you a rash and avoid them. Once you are allergic to something, repeated exposure will cause repeated and worse rashes. Check with a dermatologist to confirm and certain blood and skin tests may be done to check allergy levels and to find out allergens as well such as patch testing. Avoid direct sun/dust exposure on the area. Wear loose cotton clothing. Use a mild nonfragranced soap and always moisturize with a hypoallergenic product such as Cetaphil. For the rash apply Calamine lotion 2 to 3 times a day when itchy. During a recurrence of new rashes or severe rash apply a steroid-based cream like Mometasone for 5 to 7 days till it heals. Do not use for a prolonged period, more than 2 weeks. Antihistamines like Levocet or Benadryl can be taken till itching subsides. Keep in mind that it is recurrent if exposed to allergic items and will take a while to heal. Don’t scratch the area. Visit a dermatologist for follow-up or if it persists. I have answered your query. Let me know if I can assist you further. Regards, Dr. Dinah Levillard