Thank you for the question. A common cause of progressive thinning of the hair includes female pattern hairloss. Scalp dermatitis can cause the scalp to be itchy and painful. You can see your doctor or dermatologist for assessment and treatment of your hair problem.
It is difficult to comment if the treatment at scalp centres are effective. Often, there is a fine print to state that treatments are not scientifically proven. For medical doctors, it is difficult to endorse treatments which are not scientifically proven and which are not evidence based.