I advise you the followings for your condition:
drink plenty of warm fluids. Drinking warm fluids helps to loosen the secretions in your sinuses so that your mucus flows more freely, making you feel better faster. Studies show that drinking warm fluids relieves cold symptoms such as runny nose, cough, sneezing, sore throat, and fatigue.
Hi,
As your skin is very sensitive, better to use any homoeopathic or ayurvedic skin whitening creams like Bakson's fairness cream, Medisynth's Witch Hazel cream, Patanjali's, Vicco turmeric, Biotique's Bio-Coconut, VLCC's Snigdha, etc.
Black stool is not a good sign for you .as you are suffering from dengue there could be chances of internal bleeding and may be thats why you are facing this. So for precise diagnosis we should know your platelet count or are there any red colour eruption or patches on your body? It can be medicinal effect also .i will advise to consult your nearby general physician.
I will suggest you to eat any nutritious home made food with adequate fluid intake and take physical rest and you will be cured with dengue on its own.
Having issues? Consult a doctor for medical advice