Hi I am 36 year male and I have pain in my right hand index finger joint since one month. What will I do?

It needs to be investigated. Rule out diabetes & vit. D deficiency or any other metabolic disorder. Physiotherapy usually helps any way take paracetamol 250mg od & sos x 5days you will need other supportive medicines also. It may have to be further investigated make sure you are not allergic to any of the medicines you are going to take. Do reply back for private consultation and detailed treatment plan.