has to be admitted dr yogesh batra head of the gastroenterology department at blk superspecialty hospital said doctors also said that those suffering from diabetes heart diseases and other comorbidities need to be extra careful hot weather leads to decrease in blood pressure therefore change of medication is required in such patients heat also leads to sweating and decrease in body sodium which can affect people with hypertension and diabetes as they are on diuretic drugs said one of the doctors he added that vomiting and nausea caused due to food and water borne diseases lead to fluctuating blood pressure and sugar levels the doctors also said it is advisable to eat fresh and warm food always heat the food before consuming also carry a bottle of water always said dr g s grewal general physician who runs a clinic in ashram people who are used to airconditioned offices and homes most of the time should avoid sudden change in body temperature he added spending long time outside in peak summer is known to cause heat cramps and heat stroke dr atul gogia senior consultant internal medicine at sir ganga ram hospital suggested carrying an umbrella or weaing a cap as protection against exposure to sunlight drinking enough liquid is important to maintain fluid levels in the body he said meanwhile despite the heat cases of mosquitoborne diseases are also on the rise municipal corporations said seven cases of dengue has been reported in delhi this year of which five patients are from other states no malaria case has been reported so far