Nosebleed (epistaxis) usually indicates body weakness and it can be caused by an infection, cold weather or the drying effect of central heating (mainly they can be divided by local and systemic factors). If the mucous membrane becomes inflamed or cracked, it's more likely to bleed if it is disturbed.
You can usually stop a nosebleed by pinching your nose. If node bleeding happens quite often or lasts for too long, you should seek for medical help or contact otolaryngologist so the cause can be determined. Nosebleeds aren't usually serious, however frequent or excessive bleeding can be more serious for older people whose blood takes longer to clot ([haemophilia]) which can lead to iron deficiency (such as [anaemia]). To minimalize potential harm, [cauterising] is advised in this case.[NHS]
During cold winter seasons nose bleeding is associated with low [relative humidity] of inhaled air, so you could try some air room humidifiers and see if [increasing humidity] will make any difference.
To handle cold in general, while there's no cure for the common cold, there are the methods which can ease cold symptoms such as:
What was the reason?
I don't think the OP was asking how to deal with the common cold, but with epistaxis. anongoodnurse
In my understanding OP is asking about a common cold in summers ('How to handle cold in summers'), as well as in the description 'i have got a bit cold'. I understand he included some medical background, but I think question is about having cold. Therefore I've answered in this way. Anongoodnurse interpreted the question in different way, posting her answer day before and today removing mine (only because I've interpreted it differently, maybe as non-native speaker I did).
In my understanding epistaxis is a medical term for nosebleed which can be caused by different factors including a common cold (e.g. virus infection). Pure immune function is a risk for developing such disease (including nosebleed).
I've asked JohnP why he thinks my answer was removed, he replied:
I believe it was that and that you were addressing the common cold, rather than being cold as was pointed out in comments.
So it sounds like my answer was removed by only missing small claim which I missed to link? Is it the right reason for removal? Or because one mod interpreted the question in different way (by only thinking that the OP asked about something else than a cold, which is clearly in the title)? The removal is definitely not clear for me and this should be explained.
Including clarification what action should I take, so my answer would be undeleted.