Allergies. Allergies can cause a runny nose, sneezing, itching, or coughing. Food allergies are the most common in babies, but pets and insects can also cause an allergic reaction. Learn about baby allergies and how to ease them. 1  Facebook. 2  Pinterest.
But redheads as a group have more in common than only their hair color -- certain health conditions appear to be more common among people with red hair. Here are five health risks linked with being a redhead. About 1 to 2 percent of the human population has red hair.Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in redhair that makes it red is called pheomelanin.ut redheads as a group have more in common than only their hair color -- certain health conditions appear to be more common among people with red hair. Here are five health risks linked with being a redhead. About 1 to 2 percent of the human population has red hair. Redheads have genes to thank for their tresses.
Having red hair is a rather rare quality among humans â no more than 2 percent of the global population are carrot-topped. However, in Scotland, redheads are numerous â and local scientists would like to find out why. The ScotlandsDNA project has launched a program to count all the country's redheads â and to learn why the 'red head' gene is so prevalent among native Scots. BBC reported that researchers estimate about that 650,000 people in Scotland are ginger-haired â about one-in-eight of the total population.