Skin, Hair and Nail Problems

I've a red dark colour pus kind of thing on left side of my knee. I'm attaching the picture. Please tell what it is.. Is not paining

After 1 year hiv Is conclusive or not,please tell me sir iam very depressed,please help me thank u sir

Respeted sir I have hay fever and atopic dermatitis , i am allergic to perfume, my doctor has prescribed me ceratop moisturizer cream, it is safe? Because ceratop moisturizer has perfume in it.

Respected sir I am allergic to clothes, i start sneezing i have hay fever i take allergra. Which fabrics shall i wear? Please help me

Small rashes around neck with irritation and redness, had travelled in sun light and also wore cooling clothes in travel

Oily head skin and suffering from dandruff, and hairs are getting thinner on the middle of my head from last 3-4 years, i am just 30yrs old is there any. solution to stop it, i have good hairs on my other body parts and my protein intake is also good i have strong nails also

I have freckles under my eyes and on apples of cheek. As I am participating in a pageant I want to get rid of those. Pls advise

I have LSA. Is skin biopsy really necessary to know the progress of the disease and go for treatment?

These pimples have been over my face for at least 5 years now I tried everything but nothing works please do something about it

Hello , I have been taking doxycycline since 2.5 months ( 1.5 months daily and rest 1 month on alternative days ) but I'm not seeing much improvements with this and acne still pops up on face every 2 to 3 days once. Have been applying Benzac ac gel on acne too.. could you please suggest if I need to stop doxy or any best course of action that I can take for now .