Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain the symptoms are pointing towards a condition known as Candida Overgrowth Syndrome or Chronic
Candidiasis which is a
fungal infection caused by a fungus known as Candida Albicans..
The white foamy coating on tongue is
Oral Thrush and is caused by the same fungus..
Other symptoms of discolouration of nails and cold feeling can also be due to it..
You should consult an Infectious Medicine Specialist and get evaluated and a thorough clinical evaluation and microscopic examination of the specimen from tongue coating and discolored nails can help in confirming the cause..
You can also be advised to get complete blood picture, blood sugar done to rule out for the underlying cause of the problem..
If fungal infection is confirmed he/she can advise you to take anti
fungal medication, Probiotics like Yoghurt and Garlic..
Probiotic supplements containing
Lactobacillus Acodophillus can also be advised..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.