My Friend and I Both Have Missing Patches of Hair

yesterday afternoon my mom noticed that i had a patch of hair missing from the back of my head. i dont know if its a disease because my friend had the same problem but he had patches missing everywhere in his head and i dont know if im heading in that same direction. i hope not but it scared me when i found out i had a patch of hair missing. could you tell me what i could do to regain that hair back or what i should do to cure it? thank you for your time. have a nice day

I would like to have more information about your situation. A bald spot in two people who are friends could have environmental or infection causes. What is the age of you and your friend, do you share the same living space (apartment or house), how long have the patches been there? Are they progressive (getting larger) or are they stable and getting better? Are the patches punch like with sharp edges or irregular patches along their rim? Is there any hair inside the patches? I would like to see some photos of these patches. I might be able to give a better indication after seeing the photos, but it might be easier and better to see a good dermatologist in your area and get to the root of the problem. As you can see from my questions, making a diagnosis over the internet can be a problem and a visit ‘one on one’, with a good doctor is the best way to go.