Hello and thanks for trusting me to help you. I am a board certified consultant with over 30 years of experience.
Well as you describe,possible causes may include folliculitis.
You should apply OTC 1% hydrocortisone cream mixed with bacitracin ointment.
And use abzorb powder if you have excessive sweating.
Fungal infection,eczema are other possible causes.
You can take anti histaminic medication like cetirizine for symptomatic treatment of itching.
Angular cheilitis is a common inflammatory condition affecting the corners of the mouth or oral commissures.
Also multi-vitamin supplement can be taken.
Hydrate yourself with plenty of fluids.
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