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Regarding your question

What are the treatments for red non itchy spots?

1.Drinking plenty of fluids
2.Avoid irritating food filled with spices
3.lotions and moisturizers 
4.Antihistamines like claritine
5.Corticosteroids and hydrocortisone

What are the causes for red non itchy spots?

1.Allergy to certain foods, pollen or dust
2.Bed bugs
3.Heat rash
4.Angiomas
5.Irritant contact dermatitis
6.petechiae or bloodspots
7.Rosacea

What are the investigations for red non itchy spots?

1.Clinical assessment at the nearest medical center
2.Blood test
3.Allergy test
4.Skin examination by dermatologist
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