Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. As per your complain hairfall can occur due to a number of causes like Androgenic Aloepecia while other causes comes under Telogen Efluvium caused by fungal infection,nutritional deficiency, stress, long standing illness, side effects of medicines.. You should consult a Trichologist and get evaluated and he can advise you investigations like hormonal assy, blood tests, trichogram, dermoscopy to rule out the exact cause of the problem and treat you accordingly.. You can be advised to apply 5% Minoxidil lotion over the scalp.. You can be advised to take Biotin and multivitamin supplements.. You can also be advised to take Finesteride orally if there is androgenic aloepesia as it suppresses androgens.. You should massage the scalp with warm coconut oil.. You should take a nutritious diet and drink plenty of water.. You can also discuss about platelet rich plasma and Mesotherapy.. For darkened patch consult a Dentist and get checked, it can be black hairy tongue and for this cleaning your tongue using a tongue scraper and eating hard foods can help. Also do warm saline gargles and hydrogen peroxide gargles. Maintain a good oral hygiene.. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Honey Arora