Minoxidil is a good and safe treatment. Unfortunately, it has some (severe) side effects such as impotence. Alternative and safer treatments are PRP (platelet rich plasma) injections, LED therapy and ultimately hair transplantation. On the website, you can read more about these treatments:
It appears that you may be having a reaction to the vehicle where the Minoxidil is diluted. Please consult a dermatologist for evaluation. Thank you for the contact.