You don’t say whether there is a bald patch which could simply be a patch of alopecia (hair loss) for which you would be best advised to see a dermatologist. If your hair is simply short in that patch and doesn’t seem to grow, then I am going to hazard a guess and say that your hair is finer of texture and you perhaps sleep on your back and put this area under undue stress. I can recommend that you sleep with a silk scarf on to reduce friction on your pillow. I am also going to recommend WEEKLY use of Dark and Lovely 3 in 1 Shampoo, followed by Dark and Lovely Anti Breakage Healing Treatment to reinforce and strengthen the hair. The Dark and Lovely Anti Breakage Oil Moisturizer will reduce breakage up to 10 times and is recommended for use 2-3 times per week.