what is the solution for this can you tell sir. Can you suggest any medicine
these are happening because of your age. at your age hormonal changes are causing the problem.
it will reduce on its own as age goes by.
you need to drink lots if water and apply clindamycin gel in the night and wash your face three times a day with a mild soap or a facewash.
you could even go for chemical peel.
consult a dermatologist in person for further info.