Crack feet is a common discomfort.
Need to use proper regular foot wear of proper size,good standard company outfitting foot wear.
Socks and shoes
Use Coconut oil
Or vaseline
Or moisturizer cream like moisturex daily after bath and before bed.
To take more of vegetables and liquids.
Avoid taking beverages

Doesn’t look like sweat rash
Could be any other rash,like Atopic dermatitis.
For sweat rash
Do leuk warm bath twice a day.
Wear loose cotton of clothes
Avoid sweat retention.

Good dusting powder like Abzorb powder morning
Local application of medications like Zydip lotion night

Nail infection due to fungus is Called as Onychomycosis.
Use oral Antifungals pulse therapy
And topical nail lacquer for 4 to 6 months as prescribed by dermatologist.
Avoid using over the counter creams,because steroids in those creams increase the disease or damage skin when used .
To havecskin protection
Like using moisturizer cream.
Keep skin dry after cleaning
Physical protection like wearing gloves and covers
For nail fungus
Care to be taken is
Avoid repeated washing hands ,avoid irregular usage of chemicals- use of detergents, sanitizers, utensils and toilet cleaners.
keep skin dry
Occupation has a role, check out with your occupation.

You are being having Male Pattern Alopecia also called as Androgentic Alopecia.
Cosmetics or medicines are not for trail and error.
Your problem is familial with a genetic inheritance
And is due to male hormones like DHT.
If in early stage hair fall can be decreased and delayed.
Consultant dermatologist
After evaluation you may be given
PRP therapy along with oral Finasteride only after evaluation

Skintag/Acrochardon
These are not warts.
This is a common problem.
Not contagious like warts.
Sudden changes in body like stress, weight gain, obesity, Underlying disease provoke skintags.
No medication orally for skin tags
Treatment
Radiafrequency removal or Laser removal by experts under anaesthesia.
For prevention of reccurence
Control of stress, weight gain,taking zinc supplements for the general body health

Is it first episode or a repeated episode
Have you used any local creams on own or purchased from medical shop.
Stop creams if using any not prescribed by dermatologist.
Tab Ebastine M night for itching for 5days.
Flucos gel night for local application for the itchy areas for 1 week
Abzorb powder morning .
Keep personal hygiene by washing inner garments seperately soaked and sun dry.
Change innerwear if the problem is repeated again and again.
Consult Dermatologist for direct examination which is more specific and accurate diagnosis can be made