The skin reflects our overall health and acts as a
barrier against the outside world, is the largest organ and is
composed primarily of collagen. Collagen fibers form an elastic
network that makes up connective tissues. The skins elasticity,
strength and smoothness come from the makeup of the collagen
fibers.
Neem (Azadirachta indica) :

The leaves applied externally, is very useful in skin
diseases. Many of the historical and modern day uses of neem
leaves and neem oil have been to treat external skin
conditions. The seeds, bark and leaves contain compounds with
proven antiseptic, antiviral, antipyretic, anti-inflammatory
and anti-fungal uses.
Neem are also beneficial in the treatment of boils, chronic
ulcers, eruptions of smallpox, syphilitic sores, glandular
swellings and wounds. They can be used either as a poultice,
decoction or liniment.
Sandalwood (Santalum album):

An
emulsion or a paste of the wood is a cooling dressing in
inflammatory and eruptive skin diseases such as eczema,
erysipelas, an inflammatory disease of the face, and prurigo -
an itchy eruption. The oil is useful for scabies too. This oil
mixed with twice its quantity of mustard oil is used for
removing pimples. In summer, regular application of sandalwood
paste on the body, especially for children, has a refreshing
effect, which heals any tiny infected spots.
Manjishtha (Rubia cordfolia):
According
to Ayurveda Manjistha is probably the best alternative
blood-purifying herb in Ayurveda. It cools and detoxifies the
blood, dissolves obstructions in blood flow, and removes
stagnant blood. It is having healing action, thus helpful in
erosions of gums and bleeding gums.
For Acne, Pimples Boils, Eczema: Apply an amalgamation of
Manjishta with red sandalwood powder, turmeric, kuth and
Fuller's earth (multani mitti) on the affected area.
In Ayurvedic medicine it is used as an immune regulator. Its
antioxidant properties are also being investigated. Its role
in supporting heart health is evidenced by studies that show
that it regulates blood pressure, blood vessel constriction
and the tendency of blood to form clots.
Giloy (Tinosporia cordifolia):

Giloy is a bitter tonic that is useful for immune diseases and
Pitta (inflammatory) diseases. It purifies the blood and
effective in fevers. It has also been used to strengthen the
system before and after chemotherapy. Giloy has been proven to
be effective in inhibiting the growth of bacteria and
enhancing the buildup of immune resistance. In a study using
human white blood cells Giloy increased the killing ability of
macrophages, the immune cells responsible for fighting
invaders.
Diet & Life style:
Stay hydrated- drink 8-12 glasses of water a day.
Avoid direct sun light- by wearing protective clothing,
staying on the shade and applying sunscreen daily.
Avoid or limit your toxins. Intake this includes alcohol,
coffee, spicy food, drugs, limit sugar intake etc.
Get rid off dead skin cells; exfoliate regularly.
Maintain a cleansing routine- remove makeup daily (do not
wash more than two times a day).
Exercise regularly, to reduce stress. More intake of oxygen
in resulting in firmer and nourished skin.
Maintain a healthy diet, eat foods rich in essential fatty
acids, vitamin C, vitamin A, and vitamin B. This include
fruits, vegetables & fish .
Take Health food supplements like NEEM GUARD
Getting great skin takes time, but it isn't difficult.
Allowing yourself to get into a good skincare routine is very
important. In addition to following the steps outlined above,
you must also be sure to drink plenty of water