What Are Some Natural Sources Of Collagen?

Rashes are caused by a variety of things but the most common are allergens, bacteria, hormonal issues, or irritant chemicals.  The important thing is that you understand the cause of the rash - you can't treat it effectively until you do.

If your diet is normal - you are eating balanced meals - and you don't have any unusual health conditions then the simplest thing to do is to apply a hydrocortisone cream to the rash.  Cortisones ARE a natural substance, things don't have to be made from snake skin and rag weed to be natural.  If that doesn't fix the problem try something like neosporin ointment.  If the problem doesn't go away after that then you need to consult with a doctor for the appropriate treatment.

The only actual "natural collagen" is found in humans and animals, so I don't think you would be able to extract it from someone (or something) and use that!

"Natural collagen" or indeed collagen products are a poor quality, incomplete protein as they don't contain all the essential amino acids. Manufacturers claim that they can improve skin quality although there is no mainstream scientific evidence to support this.

It is more likely that there is something else underlying that is causing your rash. Your best bet is to see your doctor who can help diagnose what it is. It is more likely you will be given some sort of steroid cream to clear it up.

Cosmetic collagen preparations are prepared from cow skin, fish scales and sometimes animal placenta. All that aside, for help with your rash see:
   familydoctor.org

So, it looks red? You do not use a collagen for that. A collagen is used to replump the skin