The treatment is to use antihistamines, which are usually available anywhere. Benadryl is an antihistamine which can be used. Adults should take 50 mg four times each day. Salt water nose spray can help the runny nose. Ice water which is sterile can be used to relieve eye itching and swelling.
Cool baths are of benefit for hives and skin itching.
Itching can also be relieved by using Aveeno bath powder. Calamine lotion can also help, although sometime it makes the itching worse. Cholera results when the sanitation is bad. It can be carried on foods and in uncooked shell fish and shrimp. It is caused by the Vibrio Cholera bacteria and is usually a self-limiting disease.