Need help with skin condition

My dog (11 years old,male) has these small black things (looks like and size of a rice grain) embedded under his skin on lower abdomen and inner thighs. They keep on increasing in number. He is not in pain, but the skin is red and sometimes licks the area. I have consulted the local vet and medicated, but no results. Can anyone please help me in the right direction for treatment? Any advice is much appreciated.

Hello- I'm afraid that I don't know what this is, but I did wonder about a few things (in no particular order)  1) some kind of parasite (what country are you in? - there are many parasites I don't recognise in non UK countries) 2) 'wet' dermatitis with secondary yeast infection or similar   3)  other foreign bodies 4) a wound 5) cancer eg melenoma.  What worried me about your post however, is that you say that you have consulted your vet and no results, as though there is no point ever consulting a vet again on the subject (it's great that you're speaking to me but of course, I am a limited resource.  I can't solve the problem at a contextless glance; I cannot examine or test the patient closer from here;  I have no prescribing power; in short, I am not your vet).  I suppose there is a possibility that your vet is completely useless and you need to see a different one, perhaps one that likes skin cases.  But more often than not when I hear 'I have consulted the vet but no results', it's simply a communication issue.  The vet might have given you something to try, which didn't work and you never went back, so the vet assumed that the patient had got better.  If the vet has given you something to try and it hasn't worked, perhaps they were trying to rule out the common things before they got started on tests; or maybe the disease they tried to rule out first wasn't the one the dog had, so they needed to treat for the next thing; or perhaps there is some problem with the way the treatment was being applied that needed to be solved.  In each of these cases, I would expect the vet to explain very clearly to you what they were doing and why, and at what point you should consider it 'not to have worked' or at what point you should return.  But assuming that this hasn't happened, it sounds to be as though it is time to see a vet again.  It may help to ask them:  a) do you know what this is yet?  (the answer is often 'no' during early consultations becuase more tests need to be done)  b) what might it be?  c) how do we tell the difference between the things that it might be? - is there a test?  d) what results are you expecting from the treatment  e) when should I worry that it hasn't worked / see you again?  f) if you don't know what it is, is there someone we can consult who can tell us what it is? I hope that this way, the problem will get solved. The skin does look very sore, especially given that it is being licked;  the licking is likely to make it much, much worse.  We would therefore advocate returning to your vet as soon as possible for further advice.  

Thank you for your reply. Regarding your queries, I am in India. My dog also does has fungal infection but it gets treatment and is better. Regarding this particular problem, the vet has been seeing for about 6 months and did give him couple different injections. I also applied lotion and clean area with Bitadine regularly but no result. So I'll  have to take him is to a bigger hospital in a city which is going to take some time as I live in a village but I wanted to try my luck and see if I might get any result here. Thank you again for reaching back.